Hi, Amanda. This is a real common problem. Check down the board for a post titled "Water spots on my table" by Sherri on 5/14 and my response. By the way, you can use mayonaise instead of the petroleum jelly (Vaseline) if you don't have an of the petroleum jelly around but I think that the petroleum jelly takes a little longer but is more reliable. Again, post back if steps 1 and 2 don't resolve the problem, but they usually do.