Suction Cup

How annoying is it when stuff you have in your car attached to windscreen with a suction cup keeps falling down?
After a while the cup seems to age and not work properly (loose suction) . Fear not, there is a cure. Bring it inside, boil some water and submerge the "old" suction cup in the boiling water for a few seconds, let it cool off and taadaaa its as good as new!!