What method do you use to apply the tape to the gap in clean, wrinkle and finger print free method?

I know a lot of people use clear packing tape to seal the hinge gaps, but how do they get it down into the groove neatly? I was thinking of misting my glass table with water and few drops of dish soap then making narrow straight edge the length of the groove, placing it on the center of the tape (tape being already cut to length), folding one half over the staight edge then lifting the tape off of the glass. If this works, I would have the tape long enough along both sides to allow me to trim each side to the top. Sounds good, lol.. may not work in practice.

So what do the pros do?

Best regards,
Randy