I'm trying to to spend any more money because over the years I've bought so much and have plenty. I just noticed that the supply caddies I used this past year have tons of pencil marks. I wish I had noticed before because I know which bugaboos it was and would have had them scrub it. I've seen pictures of people putting them in the dishwasher. Will that work? Or do I just need to scrub myself or buy new ones? I have 3 sets of caddies but 2 are kind of big for the desk spacing I have this year so they small, pencil graffiti ones are it.