The drums smells fusty, really wet, mouldy and dank. It's not the soap drawe, I've cleaned that out. I've also cleaned the rubber seal (and that was grim). It's had a hot wash with napisan go through it this week and I've tried running it with old towels and vinegar.
Empty your filter thing too, they often contribute to the smell, and yes, hottest possible wash with soda crystals in an empty machine. I just did my monthly hot wash/filter check and we are all fine and dandy again after getting a little musty smelling earlier this week....
Oh, and fabric conditioner is a sure fire way of building up the gunk which then causes the smells. Use powder not liquids for detergent and only use a small amount of conditioner. I ditched it completely last year and my machine is in much better shape now.
The filter thing is probably located on the front of machine, low down, turn a round disc and behind it (have tea towels/bucket ready to catch the water) will be revealed a long bent rather phallic shaped filter/basket thing. If you have never cleaned it, it may well be full of fibre/fluff and it will produce water on your kitchen/utility floor!!!!
we have to remove the bottom kick plate from the machine to get to the screw bit at the front of the filter. I also use powder after liquid detergents ended up making marks on the clothes. I do still use fabric softner though.
I know where the filter is I think (twirly plate on the front) but it is one of those jobs that the Ex used to do so I've not attempted it. I will have a pop tomorrow and let you know how I get on. I usually use soap nuts/eco balls and just liquid for the manky loads but I've been lazy recently and just bunging in liquid for everything. Maybe that's not helping.