What will break down these dead leaves?

I have some dead leaves that are trapped in an unreachable place and I want to break them down into a fine sludge or silt What will do the job without hurting the aluminum that contains them? Chemicals? Enzymes? Please helpThanks

They will eventually break down on their ownBut if you want to speed up the process, sprinkle a little diluted Miracle-Gro on themThey will form a rich compost, not sludge or silt.