How to Clean a Fuse Holder | DoItYourself Step 3 - Cleaning Inside of 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 emery cloth and fold it over the edge of the screwdriver. Now, use the screwdriver for slowly scrubbing away the internal edges.Author: Anubhav KapoorCeramic Fuse vs Glass Fuse · How to Wire a Car Fuse Box A dirty fuse/fuse box can lead to big.. - Ironclad One way you can clean the connections in your fuse box is with a small wire brush. After removing all of the fuses and disconnecting the battery, use the wire brush to clean each connection. If you do not disconnect the battery, the wire brush will likely spark each time you touch more than one connector.