[saphireSue]

I've used "sticky stuff" the two sided tape it works well, stays on long and doesn't leave much if an residue.
downside for me is it's to long [doubling doesn't work on me] so I have to cut it then part of it still occasionally show so it actually take me longer to use it.

Pro nose adhesive, works great stays on at least 12 hrs for me. but you have to use remover to clean it, the adhesive can build up.

Putty, can get messy if you try to remove it. I just leave it in the nose, Last one lasted around two years. before replacing.

I've never tried the string, mainly because I can't stand anytype of elastic band around my head, I think it around my face would drive me nuts.