I use the Crayola washable markers. they have always washed out when done. I even use them for marking on clothing I am making. love them!

I love using FriXion pens when marking fabrics.

http://www.missouriquiltco.com/shop/detail/4134

It disappears when touched with a hot iron. I love it for drawing stitching lines or tracing patterns. I have the multi-pack of colors so I have plenty of colors to choose from.

Can you give us a link or a lead? I couldn't find it by googling. Thanks!

For darker fabrics, I prefer to use a bar of white soap. Washes out easily and won't become permanent whether I get it wet, press it, whatever. I get so tired of having to remember not to iron on this pencil because it will become permanent, or get that pen wet because it will become permanent... what a pain.

what ever you use do remember to always test on all the fabric you are using as they can react differently, don't find out the hard way!!!!!!!!!