After reading several posts in this thread I got out a spray can of Simple
Green that I have and actually read the directions!
What it actually says regarding "soak" time is: "Let foam stand on surface
for several minutes." "Leave on longer for heavier soiled surfaces."
It then goes on to recommend scrubbing, rinsing with water and drying.
From those directions I would conclude that 'longer' would mean more minutes
of soak time, not hours, days, weeks or months!
Perhaps the directions are different on different forms of Simple Green
containers (I just have the spray can) but if those directions are at all
consistent from one type of container to another I wonder where people would
get the idea that soaking chains for days, weeks, and longer, was a good
idea?
Chuck