When you are talking about "washing" your fabric what do you mean? It doesn't need to go through a long wash cycle like a pair of work pants? If you are trying to preshrink your fabric (and I do not) you just have to put it in a very short very gentle cycle to wet it and spin it and dry it. Don't over dry it either. If it is falling apart on a gentle cycle you wouldn't want to use it anyway as it will fall apart. :D
This is just my thoughts and feelings about it. I don't even prewash my fabrics I like to have them have to old look after they are washed. Sandi