It depends whats wrong with the watch !
Put it in direct sunlight.
buy a new watch
all you need to do is put toothpaste on it leave it for 5 minutes thn wash it off and your finished
u could go to a blockbuster and by the disk cleaner filler or u could go to a radio shack What u'll need is: 1) Banana 2) Banana peel 3) Glass cleaner 4) Soft cloth dnt do that wat you should is get...