Put up a picture of them
i have done a few sets - bleach - dyed
best is to warm wash them first - dishwasher works but misses won't be best pleased - do it when she is out
then depending on if they are faded or have stubborn grease marks and dirt ingrained - you can bleach them - but this will take the colour out more - you can dye them after - but if using, the brake marks/rub with show up what originally was