My kid scribbled permanent marker on a painted wall.
THE FIX: Apply 91 percent isopropyl alcohol to a cloth and rub the wall until the marks fade, says Tom McNulty, author of Clean Like a Man.
Note that, depending on the type of paint, this technique might strip away some of the shine; McNulty found that while the alcohol removed nearly all signs of marker, his semigloss enamel paint looked a bit duller. No rubbing alcohol? Hairspray can also do the trick. Just spray it directly onto the stain and wipe with a cloth. Whichever solution you try, first test on a small, inconspicuous area to see if there are any reactions with the paint.