I wash with warm soapy water and a brush to remove any trace of release agent, then rinse. Yes, I've noticed how much the silicone picks up lint! I haven't really worked out a way of drying it without leaving some lint from the towel or paper towel on it. Maybe a sponge to get most of the water off? Then let it air dry. As for a dust free location... I can only dream of that!
Thanks Nick! You are very helpful and always quick to provide an answer
I just saw something on FB with a list of cleaning tips, it said use a coffee filter for cleaning because it is lint-free. But there must be other lint-free cleaning cloths, surely?