I'm wondering if anyone out there has experience enough to help me with an issue with our Ginsan Multitrons installed in 3 ss bays. They have only been in service for a few months. They have been used frequently with no problems at all but on a 3 occasions I have been notified by a customer or discovered myself that they are rejecting coins (both dollar coins and quarters). Again it is a rare occurrence and overall we are very happy with them. I'm wondering if there is a way to turn down the sensitivity? I have dixmor 7 timers and a remote (if that helps at all). Each time we have had a problem we have opened the meter box and opened the side of the multitron to clean the coin path with isopropyl alcohol. It seemed to have helped but I thought that others may have experience with this and could maybe offer some advice? Thank you in advance.