For whatever’s left behind, you can use a small, soft brush to knock it loose. For a material that might get scratched, like a plastic case, use a smooth rag or baby toothbrush.
To remove stubborn marks and ink stains from plastic, glossy cases, cover the mark in rubbing alcohol. Let it sit for a few minutes, rinse the case in the warm water, then dry it with the cleaning cloth or by air. [1] X Research source Ink stains in fabric cases may be removed by applying rubbing alcohol to the stain with a cotton ball. Rinse the case so that the alcohol is removed. If that doesn’t work, repeat the process with nail polish remover. [2] X Research source
Some plastic scratches easily, so make sure your rag is soft. If you can’t reach a part of the case, use a soft brush such as a baby toothbrush.
Some plastic can develop water spots or mold if left alone, so don’t air dry.
Alternatively, dip a soft rag into the water and then use it to scrub away any marks.
Another gentle alternative to delicate laundry soap is baby shampoo, if you have any on hand.
If your case is one that has a certain shape, such as the kind that stands upright, you may wish to protect it by stuffing it with material such as tissue paper or newspaper.
Avoid vinegar and olive oils, as these leave stains and crack the leather. Essential lemon oil or natural baby soap with no color additives are better options. [9] X Research source
Many companies offer metal cleaners, too. You may wish to check a local shop for one of them.
Avoid harsh cleaners such as steel wool, Brillo pads, and abrasive substances. These leave scratches that make future cleaning more difficult. You may still wish to use a gentler cleaning material such as a soft cloth for the sake of reducing wear and being better able to get into the corners.
