This has been an issue for my 02 outback as long as I can remember. The battery hold down is co instantly getting white corrosion, as is the positive battery terminal. I've cleaned it multiple times but it always comes back. Tried baking soda, cocacola, corrosion inhibitors, felt pads, sprays, etc. It tends to creep everywhere around the battery as well. Am I just doomed to keep cleaning it every few months or are there better products/ practices I should be doing? I dont like using anything, but something needs to make some changes.