I put USB keyboards in the dishwasher. Having done that, I do recommend taking them apart and just washing the upper keycap board, and the elastic membrane und

I put USB keyboards in the dishwasher. Having done that, I do recommend taking them apart and just washing the upper keycap board, and the elastic membrane underneath it. The reason I recommend that is that the drying time takes long before all the water is gone from between the contact layers and all the keystrokes are reliable. If it's okay for the keyboard not to be ready for use for a bunch of days, then you can just wash it as-is.