Logitech G402 mouse not working properly

[cobainnn]

Hello, as the title says it, i have a Logitech G402 mouse and I've been using it for 3 years. As it's not quite possible to show my problems through GIFs or short videos, i'll try explaining the situation as best as possible.

- So first of all, i cannot slide anything with the left mouse button properly. For instance i need to find something specific in r/place belongs to the reddit platform i need to slide the whole pixel map with the left button but it just doesn't work until some time passes, or cuts off in the middle for some reason even if it works in the beginning. Even when i try selecting specific words to delete here the left button sliding just doesn't work properly.

- The second problem is this time, with clicking. This issue again happens to be only in left mouse button. when i click on an application for once it'd never open it immediately because i need to click twice, like almost everyone else here. But this time when i press on any program somehow it perceives it as two clicks and opens it accidentally and the same situation also applies for other platforms like Steam, i almost opened every single game without any intentions to do it. The opposite situation also occurs such as clicking 16th time to open Google Chrome.

Note that this issue only happens to be in left button, the rest of mouse works perfectly and this just started happening today, yesterday it was doing perfectly. I have tried plugging off from the port and re-connect it again, or simply update & delete it from the device manager, or shutdown the pc and restart it again. None of them were a solution for me.
Any solutions or suggestions?

 

[Prime2515102]

Sometimes junk builds up under the button, lift it (being careful not to break it off) and clean it out. I've had this exact problem with every Logitech mouse I've ever owned. I was returning them under warranty for years thinking the switches were bad, but it was that.

Edit: Just noticed that has different buttons than any one I've owned, it might not be lift-able, you might have to disassemble it, I don't know.

 

[cobainnn]

Sometimes junk builds up under the button, lift it (being careful not to break it off) and clean it out. I've had this exact problem with every Logitech mouse I've ever owned. I was returning them under warranty for years thinking the switches were bad, but it was that.

Edit: Just noticed hat has different buttons than any one I've owned, it might not be lift-able, you might have to disassemble it, I don't know.

I have thought of it, there is a safe way to disassemble the mouse, but i have to remove some of the parts of it permamently and i'm not quite sure whether it'll have any impacts on my latter usages.

I'm talking about these four parts.

 

[Prime2515102]

Yeah, that's the downside if it needs to be disassembled: you have to get a replacement set of teflon feet or go without them (they really can't be saved).

 

[bug]

Try something like this, it might do the trick: https://www.amazon.com/Dust-Off-Dis...90284814&sprefix=pressuri,aps,207&sr=8-3&th=1

Otherwise, just have the thing serviced.

 

[Chomiq]

Turn the mouse upside down and mash the left click. Sometimes it can help with getting the dirt out of the switch. Otherwise, disassemble and clean and/or resolder a new switch for LMB. Replacement feet can be found easily on ebay/amazon/local alternatives.

 

[cobainnn]

Turn the mouse upside down and mash the left click. Sometimes it can help with getting the dirt out of the switch. Otherwise, disassemble and clean and/or resolder a new switch for LMB. Replacement feet can be found easily on ebay/amazon/local alternatives.

Try something like this, it might do the trick: https://www.amazon.com/Dust-Off-Disposable-Compressed-Gas-Duster/dp/B073TQ26JX/ref=sr_1_3?keywords=pressurized+air&qid=1690284814&sprefix=pressuri,aps,207&sr=8-3&th=1

Otherwise, just have the thing serviced.

Sometimes junk builds up under the button, lift it (being careful not to break it off) and clean it out. I've had this exact problem with every Logitech mouse I've ever owned. I was returning them under warranty for years thinking the switches were bad, but it was that.

Edit: Just noticed that has different buttons than any one I've owned, it might not be lift-able, you might have to disassemble it, I don't know.

Looks like there's no other choice, thank you everyone. I'll try opening this thing and thus buy & use compressed duster if needed.

 

[Chomiq]

This guy has great guides for cleaning.

 

[Frag_Maniac]

I've got the same mouse, G402, and mine had been doing exactly as you described. The funny thing is, it exhibited this behavior before, then went away, but then came back.

BTW I don't think canned air is the right tool for this. Mouse dirt build up is often a mix of skin particles, dust, and oil from your skin. I've cleaned it out before and it's not something that will easily blow out. Plus it may only serve to lodge dirt down into the switch.

If cleaning the moving parts of the switch actuator doesn't fix it, the switch may very well have gunk inside it. In this case it's best to use something like a no residue circuit cleaner to dissolve it, but you MUST let it dry completely before using it again. The better ones dry quickly. In a pinch some use Isopropyl alcohol that is high percentage alcohol, but it WILL leave a residue.

That said, I feel it is ALWAYS best to try a thorough dry cleaning and LMB actuator sag removal (explained below) BEFORE trying to clean the switch itself. If all goes well, you may not even need to take it apart. If you still hear a crisp click from the LMB when it's used, I think it's unlikely the internals of the switch are too dirty anyway. With all that covers them, they are not exactly directly exposed to dust or the other aforementioned nasties. You would have to be exposing it to pretty nasty air quality for that to happen to excess.

What I've done before (as I did this time) is take a soft bristled clean toothbrush and gently brush all the accumulated dirt out of the crevices without even opening it up. I pay particular attention to the crevices under the LMB/RMB actuators, the small openings around the scroll wheel, and also the crevices around the additional buttons. Then I gently pry up on the front of the LMB actuator, which develops a bit of sag over time due to being used more than the LMB. This must be done VERY carefully and slowly, but I can usually get a bit of the sag out of it.

In testing so far I no longer have accidental double clicks and finicky selection of text and YouTube viewer controls, which was driving me nuts. No telling whether it will stay this way, as that aforementioned sag I think is much of the problem. The only way to make a sag free LMB actuator though would be to use titanium, but that would make the mouse far too expensive.

I've never tried it before, but I suppose propping the LMB actuator up to the same height of the RMB, via sticking something of appropriate thickness under the front edge of it, then carefully applying some heat from a portable hair dryer to the LMB actuator (too much could do damage mind you), then letting it sit over night to cool, may completely take the sag out.

The thing is, I'm not convinced that is necessary. I go by the logic that if when depressed the LMB switch sounds the same as the RMB switch (which was the case for me), then you only need very slightly remove sag after the dirt is brushed out to fix the problem, and that seems to be the case, at least so far. Even if I have to repeat this procedure once a year or so after sag has set in, it's better than risking doing damage, and I don't own a hair dryer anyway.

 

[Shrek]

Information and resources for fixing Logitech G402 buttons (applies to other mice, too) - Peripherals - Linus Tech Tips
"For the left and right buttons, the G402 uses Omron D2FC-F-7N switches, rated at 20 million clicks."

Once one has it disassembled for cleaning, might as well replace the switch if one has the equipment, parts and experiance.
Computer Mouse Repair (switch replacement) | Electronics Repair And Technology News Computer Mouse Repair (switch replacement) (jestineyong.com)
I like the GM 8.0 offering by Kailh (which has a claimed 80 million click lifetime)

 

[bug]

Looks like there's no other choice, thank you everyone. I'll try opening this thing and thus buy & use compressed duster if needed.

I meant try the spray through the slits, it may work without opening it up.

 

[Frag_Maniac]

Information and resources for fixing Logitech G402 buttons (applies to other mice, too) - Peripherals - Linus Tech Tips
"For the left and right buttons, the G402 uses Omron D2FC-F-7N switches, rated at 20 million clicks."

Once one has it disassembled for cleaning, might as well replace the switch if one has the equipment, parts and experiance.
Computer Mouse Repair (switch replacement) | Electronics Repair And Technology News Computer Mouse Repair (switch replacement) (jestineyong.com)
I like the GM 8.0 offering by Kailh (which has a claimed 80 million click lifetime)

I personally think even 20 million is far more than one would click the LMB in the lifetime of a mouse. I've never had a Logi mouse switch go mushy or die, or even need cleaning for that matter.

Honestly guys, I think the LMB plastic actuator piece developing sag over time is at least half of the problem, and in my experience they always do. It's pretty easy to see the sag just by eyeballing the front of the mouse and comparing the height of the LMB actuator to the height of the RMB actuator.

 

[Shrek]

If one clicked once per second for 8 hours a day (gamer), that's just over 10 million clicks a year.

 

[bug]

If one clicked once per second for 8 hours a day (gamer), that's just over 10 million clicks a year.

If you ever played some kind of games, you'd know one click per second can be pretty low
But I'm sure you can't do that for 8 hours straight.

 

[Shrek]

Just playing with numbers to see if it was possible to wear out a mouse switch in a realistic number of years.

 

[Frag_Maniac]

Just playing with numbers to see if it was possible to wear out a mouse switch in a realistic number of years.

Possible and likely are two entirely different things though. I'll put it this way, I may be 65 and retired, not to mention slower at clicking than I used to be, but I'm also free to spend as much time as I want on gaming, and I game most every day. I also fairly often play sessions that are several hours long when I've just picked up a game I really like. Yet still, I've never worn out a mouse switch, and I always use Logi, the brand that supposedly is known for the double click problem after a few years. In fact I think this G402 is the first Logi mouse that's ever demonstrated it, and after thoroughly cleaning it and lifting up on the LMB actuator to remove some of the sag, I now know it was not a bad switch causing it.