Bro, buy contact cleaner and blow it...

You can try, but contact cleaner is better.

WD-40's contact Cleaner is a good choice, but Mr.Diy Vissabela is good too.

Sorry, I got the name wrong. Here's a pic.

spray at an angle, not direct into the center hole. you will see a gap between the black/blue RomerG and the bottom one.

if still fail then you need to desolder that switch and clean it throughly with Contact cleaner and soft brush/watercolor paintbrush.

i desolder my G613 and now it's all good...

don't waste time buying Air Blower, if it's dirt and grime, it won't help much... Get the Electronic Contact Cleaner from Mr.Diy .

what's your keyboard again btw?

Oh... if that's the case, you might have a little hard time using the Contact Cleaner, since the center clear piece is blocking the access...

here's my G613 with both switches that i soldered , lazy to remove the center piece myself , it can be opened to remove the center piece before soldering it on the PCB.

You can see that there's a copper contact pin on the next switch beside the one that look likes your G810. that's where you can poke the red tube of the contact cleaner to spray. 

Desolder is the best way.

Don't pry the upper housing,  its snugly fit into the metal mounting plate. Else you will break the switches.

i afraid yes, you can't do it then. Since the center clear piece is blocking the access.

you know of any friend that can help you do that?
How many switches btw?

How old is the keyboard?

If you want help, you can send the keyboard to me , i can help you desolder and clean it.  

go to Personal Message.

any idea to claim warranty? I just realise that my logitech mouse serial is different than the box

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it is a G304, haiz, sometimes, the mouse like just release the click itself during a click move, tried other mouse no problem at all