Sometimes checking every single pocket is hard as it is and you never know, if your child has found a nice hiding pouch in his clothes and stuck his crayon inside. While you won't know then, you will most certainly find out later on, when you open your dryer and see the Jackson Pollock-inspired rainbow painting. But don't discourage yourself. Cleaners Elephant and Castle want to reassure you that this damage is completely reversible, but will take some time and effort.
Grab your abrasive cleaner and a sponge and get a-rubbing. Though, first you might want to chip off what you can without involving the cleaning liquid. This way you'll minimize any further work. Turn on the dryer so that the crayon will soften. Cleaners Elm Park advise that for the best effect, without going overboard, the dryer should be running for fifteen minutes top. Then through hard, lengthy manual labour, you will remove the majority of the melted crayon.
In order to maximize the result from your efforts, it would be best to involve the trusty old toothbrush, which is your best bet for removing the stains from the corners and other tough to get to places. Be aware that just because your dryer looks clean, doesn't mean that it's clean. In fact, test your results out. Run the dryer at its most powerful program. This way, you will find out whether or not there is residual crayon stuck in the dryer. If there is, then it will melt and leak out, which is your cue to gear up once more and start the whole process all over again.
Yes, it's not quite that exciting. Even simple sounding techniques involve a great deal of dedication and the best thing that you can do is book a weekend to get this done or ultimately, check your kids' clothing before washing in the first place. That way you won't have a mess in the dryer later on. "