Do not use a sweet cherry liqueur!
Use the finest Swiss cheese you can find. And if you want your fondue a little thinner, use a little less cheese.
If you don't have a fondue pot, you can keep the cheese sauce in the saucepan on the lowest setting on your stove.
As you dip into the fondue pot, go all the way to the bottom and stir as you do, since the cheese on the bottom is hotter than the cheese on the top.