I would use the adhesive remover and fishing line / dental floss. All good suggestions.
Mine have faded periodically, but using flitz or simichrome polish seems to bring them back nicely.
I managed to do something right for once, and using a template I made got them attached perfectly.
The tape that (Marty?) used on these is excellent. I wish the adhesive tape that was used on the MM door sills had been half as good. I think one sill lasted a month, the others about 3 days, and I had to end up using JB Weld, (dumb) and then 2 ton epoxy to get them to stay on, damaging one in the process.
Just to be sure I snagged an extra set and an extra chrome S55 emblem in case someone ever tries to pry them off the car. Cheap insurance.
Norm