been using simple green for about 12 years in a 50/50 mix. I remove the chain and cassette cogs and put them in solution. I let them soak for the ~5 min it takes to get all my brushes and other junk I need. I clean the cogs first with a brush and rinse completely with water. The chain goes last after a few good swishes. I dip my brush in the SG and scrub what’s in my hand and rinse with water. Move up a handful of chain and repeat. Rinse the whole thing again in water and paper towel dry. Install back on the bike and drip one drop of lube on each roller. I’ll spin the cranks a few times to work things in and let it sit. When it’s time for my next ride, I’ll wipe off any excess lube. I use sram chains with the powerlink and I’ve never had a problem with exploding chains or fractures, though I have heard rumors of them. Maybe prolonged soaking has a different effect?