Apply cuticle oil onto the skin around your fingers. Pour some acetone into a bow/cup/dish made of anything other than plastic! (sold in the chemist and in some nail salons) and leave your nails in there for about 30 mins.
After about 30 mins the acrylic will go sort of gooey and you can scrape it off with a manicure stick.
If this sounds too much, then go to a professional salon that will remove them properly as I have described and get yourself a lovely manicure at the same time :)
If you are anywhere near Watford check out our salon at http://www.nailcolondon.com