Warm and Natural washes and dries beautifully.

One of my cats "anointed" a piece once, so washing was mandatory.

Quilter's Dream cotton said "Do not wash" in tiny print on the BACK of the package label.

Many years ago while at Quilting by the Lake I washed batting and the machine bounced across the floor.
I do not wash batting

That could be scary! The machine may have needed to be balanced (feet adjusted), the floor itself may have not been level, or the load may not have been distributed correctly. That can happen with any wash load, and it does make a racket!