You want to keep your devices (computers, televisions, various readers and varied, etc.) for a while! So do not hesitate! A small air blow every month (for my case, but at least once a quarter for the smooth running of your hardware ...) and dust no longer resist. You do it in all the "holes", but be careful anyway to laser lenses that are very fragile ... There is no liquid is simply air but wait a 1/2 hour before reconnecting ... Simple security. Very good product
