Originally posted by Not a Number Try lubricating (before installation) by rubbing a bar of soap, candle, crayon or soft lead pencil on the threads. Just a tiny bit is all you need.
I brush a tiny amount of graphite powder on to the filter thread and then carefully blow the excess off. Only the minutest amount will do the trick and it will stay on to work for years. Graphite powder is what locksmiths blow into locks because unlike other substances it will never gum up the delicate parts inside.
But of course this you need to do before using the filter.
Greetings