1) Don't worry too much that the body wave wigs becoming straight or looser after washing.
It is common in hair market, because body wave style is made by steam or flat iron without chemistry process.
2) You can please use curling iron under 400 F degree to style it again to what you want.
Tips: Do not leave any hot tools on the lace wigs for more than 30 seconds.
Once done styling your hair, clean your hot tools, beacuse on the hot tools might have few loose hair
since you pulling down or curl the hair on the tool, so there might few loose hair but it's normal.
As well as you clean up the hair on the hot tool, then it's fine~