First tip is don't clean them at all. Not even soaking in jewerly cleaner. If anything, soak them in plain water and soap, no scrubbing. If you look hard enough, you can find rolls of wheatbacks for $4 or so a roll. Get a good loupe or lens to view them, 8-10 power is fine. I picked up a stereo microscope at a yard sale for cheap. They also make a kids toy QX-3 microscope that hooks up USB. I used to go to the bank every payday and get a few rolls of pennies when i cashed my check. There are some dates that are collectible that are not wheatbacks. 1998 and 2000 come to mind, you have to know what to look for though.
Roll them back up and turn them in after you have gone through them. Also get a roll or 2 of half dollars if they have them, 1964-1970 were 40% silver, i have found franklins rolled up and even older in there.