Smelly washing machine?

Hoover Quottro whisper 1300 checked and cleaned all the waste pipe
Found that the recirculation valve was all gundged up and consequently no water was coming out of the door seal nozzle so clean the valve and nozzle all pipes involved with that .
Removed door seal and could see mould and slime between stainless steel drum and plastic casing Tried many hot washes to remove this but still smells awful . Is their anything on the market to flush it out with or a solution to mix up.