u/1rub

I realized the wires in my parallel battery set up were getting warm or hot at the posts and asked ai about this and it said it might be the washers between copper lugs . If so how do I safely disconnect and remove them? It’s day and the 50a Renogy dcdc charger with mppt is getting a charge.

I learned they were getting hot when I noticed the plastic caps that came with the batteries were melting. I have since removed them. But some residue remains.