This is my first post so Hello from Lancashire in the UK. I am going to clean my long time owned MT 1200, every few months I take off the foam front filter and wash it but now it is time to clean the amp internally as the last time this was done was some years ago. Can anyone offer any advise as to the best method to use...thanks in advance. I have owned the amp from new since about 1989 and it as been a pleasure to own never letting me down, giving a great sound, with plenty of power, what a great piece of kit, thanks Crown. james.