Ja sam to skidao obicnim trljanjem ali ce ponovo da se vrati.
Trajnije resenje je skidanje tog silikona i stavljanje sanitarnog silikona (recimo Ceresit CS25) koji je malo skuplji od obicnog silikona ali je dosta bolji bas zbog te budji.
http://www.ceresit.co.yu/proizvodi-plocice/cs25.html
...It's nothing very special...
Try and be nice to people, avoid eating fat, read a good book every now and then, get some walking in, and try and live together in peace and harmony with people of all creeds and nations.
Monty Python's The Meaning of Life