Removing Stains From Whites Is There Any Hope Of Removing Stains From Baby Clothes After They Have Been Through The Dryer?

Is there any hope of removing stains from baby clothes after they have been through the dryer? - removing stains from whites

I pre-treatment before washing, but sometimes do not know the stains came only after pulling my daughter's dryer. I always thought if you went through the dryer the stain permanent. Is that true? I'm not talking white spots, which usually further milled. I think the colorful clothing, or several? What the experts recommend washing? His clothes were almost exclusively made of cotton.