I've had success with lighter fluid. Just get the yellow Ronsonol bottle at Walgreens and that works well. I use a microfiber cloth. It will take some elbow grease, but it will work and the lighter fluid will not damage the wrap. Some swear by Goof Off or Goo Gone, but I find those not to work as well as lighter fluid. There is also a spray product called "Contractor's De-Solve-It" that seems to work well too, although this leaves a greasy residue on the wrap.

Do NOT use acetone/nail polish remover or anything similar, like paint thinner or lacquer thinner. That will melt the wrap!