The best way to deal with a troll is with bacon. Three strips of bacon fresh off the pan. Preferably applewood. Don't be a cheapskate. Trolls have a finely honed sense of taste. Take the three strips and thread them together with nylon. Hang the bacon from a high perch. If you have a fireplace mantel in your home, use that. Leave the bacon overnight. When you awake in the morning, the troll will be gone and instead of bacon you will have a pirate eyepatch. One size fits all. Like a boss.