I have been making wine for a while and have used both the waterproof polyester and gloss paper labels but I have a problem. I put the labels on and they look great. Then, about a month or so later, they started to ripple vertically. By this I mean they are pulling away from the bottle from top to bottom in areas. I thought it was because of the polyester but when I tried gloss paper, it did the same thing. What am I doing wrong and how do I keep that from happening?