Is it true that if you put dry batting in the drier for a few minutes it takes out crinkles ,?

I would not bother to even put it in the tub. I would just fill the washing machine with warm or maybe hot water and let it soak. (My machine has a handwash cycle so I would use its rinse cycle but if you don't have that, just let it soak in the tub with no agitation.) Then drain and do a second soak if desired. This saves having to move the wet batting. Then use a slower spin cycle if possible to get out most of the water. Then dry in the dryer as suggested above.

Yes I have done this , but a add a damp towel to produce some steam ... it helps to get out the wrinkles and/crinkles. Do not do this with fusible battings.

Has anyone tried "washing" and drying Hobbs 80/20? I seem to remember being told it doesn't have scrim...so would it fall apart?

I have preshrunk Warm and Natural by machine washing on gentle, and then drying in the dryer. It didn't hurt it at all. However, it seems to thicken a bit as it shrinks, and makes a little bit 'fatter' quilt. I have pretty much decided I prefer the antique look of washing the finished quilt and letting it shrink and crinkle all together. Store bought quilts can't come close to that wonderful look!

Thanks everyone I am going to wash and dry a peice a little bigger than the quilt size for my own quilt. Sister want's a quilt thats a little more fluffy like the other one I made her. I have enough on the roll that I bought to make hers so It will be easier for me. LOL

I would wait until I am ready to use a piece of the batting and then cut it for the quilt I plan to use it on...guess I would cut it extra large though...and just wash & dry one piece at a time. Seems like this would waste a lot of batting. Let us know how it comes out...what ever you decide.