Things like regular soaking and shed aids actually do more harm than good. Water and other agents applied to the snakes skin can draw out and reduce the natural levels of the lubricant their own body produces to help them shed.
I forget the scientific name of the process, but it's the same reason that your fingers get wrinkled if you keep them in water for a long period of time ... the water draws the fluids out of your skin and shrivels it up.
Watch your humidity, let them shed, and if anything is stuck, then soak them after they are done with the shedding process ... 1 hours a night, shallow tepid water, sealed rubbermaid container with no holes until all of the stuck skin slides off.
-adam