Mechanical keyboard double pressing keys

[da na]

The Drop CTRL with Cherry MX Blue switches that I've had for maybe 3 years has started registering some keys twice for one press, most often W and I. I know very little about keyboards so I am not quite sure what the cause of this is - do the switches need to be cleaned? Lubricated? Replaced entirely? Or is there some sort of delay setting I need to adjust in software?
Thanks! 

[GarlicDeliverySystem]

could be keyboard chatter, meaning the switch is not registering the input correctly. If the board has hotswap sockets, you can try to swap the switches around and see whether the problem moves with the switch.

 

You could try to add extra lubricant to the switches, but best practice would be to swap them out.

[191x7]

10 minutes ago, da na said:

The Drop CTRL with Cherry MX Blue switches that I've had for maybe 3 years has started registering some keys twice for one press, most often W and I. I know very little about keyboards so I am not quite sure what the cause of this is - do the switches need to be cleaned? Lubricated? Replaced entirely? Or is there some sort of delay setting I need to adjust in software?
Thanks! 

It's key chattering. There are multiple topics on it in this forum. Usually a few drops of alcohol in the switch and working it out solves the issue at least for a while.