Yeah, so today I had my racquet restrung and I thought I'd mess around with some stencil ink. The girl behind the desk gives me the stencil ink and I cover my entire stringbed. Didn't think it would be so bad, but it was. In 2 hours, I wore out most of the ink in the middle of the racquet, but I still have little spots right next to the crosses and on the edges of the racquet. How do I remove these without damaging my strings? Thank you.