| | Re: microwave bows?
I used to microwave my bow and spray starch it later. The heat secure the shape of the bow because the ribbon is polyester. (about 20 m 800 w) after being microwaved the bow can be scrunched up in my hand and when I release it it bounce back again. Then I starch spray it and dry it with a hair blow dryer or alternatively a mini fan heater (in case I do a bunch of them). Works great for me.
As Shelley said, make sure your ribbon is not metallic.