How to reuse pressure cooker gasket?

It is a common problem with the pressure cooker gaskets that it becomes expand after many use. As a result pressure leaks through the sides of the cooker and the cooker doesn't function well. Before getting a new gasket, we can just try a simple trick. Keep the gasket in the freezer for 5 to 10 minutes. Because of contraction, the gasket comes to the normal stage. Use the gasket immediately after taking from the freezer. The cooker will function well.
Tip: It is applicable in minor cases only. If the gasket is very old and it has become too expanded, this trick won't be worked out.