DO NOT MIX THESE TWO TOGETHER!

Try rubbing alcohol (if it does work, be sure the rinse with water, alcohol is flamable.)

Try bleach if alcohol doen't work.

Once again DO NOT MIX ALCOHOL WITH BLEACH!

Use goo gone! It works wonders and is non toxic and totally safe to use inside the dryer. You can even use to to pre treat stained or greased clothing before washing it in the washing machine! Its just a natrual citrus extract. I use the goo gone gel spray, not the pro goo gone, just the regular! Spray it on a paper towel or old towel and just start to wipe it right away!

Refurbished a dryer recently that had the white drum stained blue from denim jeans. Found that lacquer thinner (not paint thinner) took the stain off.

I used to use something called Vandal-X many years ago and it worked on basically anything.
I found it here, though haven't seen it in stores for decades.

Here is a link that might be useful: Vandal-X

WD40 worked well for me with crayon stains. I basically sprayed it on several layers of paper towel and wiped off. Did a couple loads of rags laundry to get rid of the smell.