How to Clean a Fuse Holder | DoItYourself wwwyourself››Electrical Tools & SuppliesStep 3 - Cleaning Inside of Fuse Holder. Now, pull out the fuses within the fuse holder. Inspect the fuse for any debris. You can use an emery cloth for cleaning the fuses. Surfaces along the inner side of fuse box can be particularly hard to reach. Tear off a small piece of How can I clean my fuse box - Hot Rod Forum : Hotrodders May 25, 2012It would seem that you do have some corrosion on the terminals in your fuse box. Not uncommon for the age of your car. Definitely disconnect the battery first! Just spraying with contact cleaner might remove some relatively loose dirt, but it won't get rid of corrosion. I would use a brass bristle brush (or a fine grit emory cloth) and the contact cleaner.