Ok, so please forgive me as I'll probably win MN award for most boring thread of the year (!) but I'm going out of my mind here!
My washing is coming out of my machine smelling really musty
It will do this for a while, then I might get a wash which is just lucky, and doesn't smell 
Pump cleaned, tried hot wash, tried boiling wash without any laundry in, hubby not long ago had machine out and pipes looked at etc, and machine is only 3 years old 
I use Daz Citrus Blast, but started to think it may be this, but surely not?
Reading all kinds online (other forums) about putting bleach, or vinegar, or soda crystals etc. in drum, but I don't want to make things worse, or break my machine 
Any advice??