Feakara1

Hello everyone I just bought aan 06 Sentra SE 1.8 Its a great car! My only question is that I am haveing problems removeing the gas cap aka fuel filler cap. Sometimes I can twist it off and other times I can not get it off for days. Anyone else have this problem? I know for a fact that this is also occuring on a friends Altima and Sentra. Any replies would be great thanks. Nice to meet evryone on the board