I did a bit of research after I ran out of Norelco RC 1776 Razor Cleaner. Norelco's own site says that HQ200 is the replacement. I use RC 1776 with my old Norelco (about 15 years old that is). You just pop the heads out put them in a shallow dish and cover with the solution. Swirl for about 30 seconds, rinse, pat the heads dry and reassemble the cutters. Works great. At first I thought that this was just Barbicide (that blue stuff your barber keeps the combs in) but I looked up the MSDS (Material Data Safety Sheet) of both and they are not the same. Now if I could just find a generic version of this stuff, but then again it's not that expensive.