This is foolproof technique.
1) Immerse the stuck vessels in water by adding weight into vessel, anything heavy.
2) After water goes into the lower vessel, heat it on a flame, dry heating.
3) The water in the lower vessel evaporates. The steam pushes the upper vessel.
4) The vessels are thus separated effortlessly without causing any damage to the dishes.
Source: Mother's experience.
This page contains the following solutions.
I had 2 pans that were stuck together. After trying everything I've heard of, I finally sprayed WD-40 into the sides of bottom pan, put them in freezer over-night, dropped them on concrete this morning, and VOILA!
Separating 2 pans that have become stuck together can seem like a daunting problem. But it's not.
This way is easier than the hot water and ice method. Fill the under pot with water by finding a way to put the water in through the rim.
