Stale Shaving Cream?

Over the last few days, much of my studio time has been in organizing, I did however find that painters tape on a home made silkscreen does not hold on for very long. Also that shaving cream can go bad, or actually the stuff in the can that makes it foam can give out. There is lots of liquid left in the can that I have, I can hear it. When I tried to get some out, it looked like milk and was runny instead of fluffy. I can't remember now who it was but someone on location on QATV used shaving cream with acrylics through thermofax screens. Anyway, fresh shaving cream apparently works much better. I will let you know if I get better results any time soon.