Thanks for the replies, yes i understand the possible downside of using MRC regarding damage to the rubber in the rollers so i am avoiding using it.
Interesting to see the VARN product keeps coming up in my search,i will take that as positive feedback.
I use iso. alcohol. The key is not to "flood" the rollers. Put the cleaner on a rag and wipe the rollers down. Avoid getting the solution between the metal shafts and glue under the rubber.
I've used type wash with heavy ink build up. Use it sparingly.