I may do this. I think the value of all of my coin roll circulated silver coins (all 90% silver and thousands in numbers) is around melt value. I am thinking of cleaning some of them in a simple bath of mild soap and water. Comments? I would be doing so to take over 60 years of dirt and grime off the coins. I also bought an old microscope ($25) so I can inspect a lightly cleaned silver coin. I think some older circulated coins are worth more than their melt value and have not been recognized. I'll start with half-dollar coins and go with $0.25 and maybe $0.10. I am just a hobbyist accumulator.