How would you get nail glue off of plastic with out ruining the plastic???

I got this new cell phone cover at the mall and the next day i broke the lens and so i glued it with nail glue you know the 1 that makes you fake nails stay on for a long time. that kind. it was really stupid but it got on the plastic and i dont know how to get it off with out something happening to the plastic? PLEASE HELP ME.How would you get nail glue off of plastic with out ruining the plastic???
Try 'goo gone', maybe even warm it up a little b-4 applying it. I use it for maaaaaaany things and it seems to work very well on any surface without damage. you must let it sit for a little while before wiping it (2-3 minutes). If that does not work, there are harsher chemicals such as 'goof off', but this may cause damage. I would put some of this nail glue on a similar surface to the lens but not important to test differnt ideas on b-4 applying it to the cell phone lens, this will lessen the chance of damage.How would you get nail glue off of plastic with out ruining the plastic???
apply an acetone or acetone-containing nail polish remover to the area for about 15 minutes and then see if that makes it soften up.