Make sure you do let the cage dry out in between misting--if it is too humid it can actually be harder for the gecko to shed. Increased humidity during shed is good, just not so much that it doesn't dry out some and things are molding.

Get a deli cup or some sort of small tupperware container with a few holes in it and put some sopping wet paper towels in it. Put the gecko in it for 1-2 hours to soak. Then try removing the stuck shed with wet q-tips. The skin should come off much easier, but if not, return the gecko to its cage overnight and see if some of the skin starts to slough away. You can do this several days in a row if necessary (continue to mist but let the cage dry out in between mistings).

If the skin is still not coming off easily let it be until it sheds again (you don't want to force the skin off and risk tearing the good skin underneath). A little temporary stuck shed won't hurt anything as long as it is not allowed to build up. Try to keep the humidity at 60-80% until and during the next shed to aid in the shedding process. The next shed should come off okay and take the old skin with it, but you can soak the gecko again in the deli cup if needed. As long as your humidity is kept at a good level, you shouldn't have repetitive bad sheds.