How do you attain rid of the smell from an outdated thermal rest that hasnt be used surrounded by years? thats whay it smells.? i know that if you don't use things like tents and such...

i know that if you don't use things like tents and such and leave them within a bad place they get this discouraging smell. so should i try washing it with a sponge or of late leave it in the sun.
Answers:    wipe it down next to vinegar and water and leave it outside on a nice sunshine,and when inside spray it with Lysol .