“It’s a consequence of using liquid detergents and low temperature washes.”
I lead and interesting life and did lots of googling on this. We had a new kitchen installed and were very concerned that the drainage pipes didnt have enough slope on them as the washing machine was smelling quite badly.
….anyhow from everything I read it said liquids make your machine smell, so we have changed to powder and it really has helped.
Also every so oftern clean the machine out by putting a dishwasher tablet in the powder draw thing, and one in the drum. It really does work! Clean as a bell and no smell.