In the past I've removed adhesive attached items using the monofilament saw technique...some heavy mono fishing line drawn back and forth under, in my case a tank emblem, and it lifted right off, then a dab of good old WD-40 and the gunk was gone too. Betcha the reflectors will do the same.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)