anyone else find removing tomato sauce stains from clothes harder than it looks?

On a mattress the trick is using as little water as possible. Scrape off what's on top, then blot with a cloth dampened in cold water and a few drops of washing up liquid, working from the outside of the stain inwards. Blot dry with a towel, repeat a few times rather than soaking it once. Leave it to dry fully before you put sheets back, a fan helps. Foam that stays wet starts to smell.