I overcast the raw edges before washing.
Do not overload the dryrr. If I have a long piece, I check it every so often - it it has balled up, I unball it so the creases won't get baked in.
My dryer has a setting for how dry I want the things. I set it to "just" dry. ( don't you love that prrcise terminology?) Usually it comes out of the dryer smooth enough to fold and hand press Until I am ready to use it.
I usually iron the fabric with steam - on the back - somehow it is easier for me to spot flaws from the back -with the grain.