I would not use it. If you need to get the red out try soaking a white towel in water and bleach. ring it out just so it is not dripping. throw it in the dryer by itself and turn it on. when dry the dryer will hopefully be white again. I did this when my husband exploded an ink pen in the dryer. when the cycle was done ink was gone and towel was white. i saw this on line. Ii had nothing to lose and saved my husband hundreds of dollars since he didn't have to buy me a new dryer. LOL!