A sticky nuisance

Swiss drivers know it: every year there is a new motorway vignette. The old one should be removed and is deadly sticky. Today I changed ours as from 1 February there is a fine when driving on motorways without a valid vignette. 

There are several tricks to remove the old vignette. Using a hairdryer works quite good (heating up the old sticker until it becomes soft and comes off better).