There's an ad on TV
that gets me wondering. it starts off with a room filled with mountains of clothes etc waiting to be washed, and a voice over saying," you wash loads, but what about your washer?" (possibly not the exact words)
Then it goes on, "every load leaves behind (something) and grime" - here we see a hand wiping fingers around the rubber door seal and then rubbing fingers and thumb together, "and what's that smell?" says the voice over.
Then the voice tells you about a product you can buy to clean your machine.
Now I don't know about anyone else, but I've never had to buy any such product for my machine. She is 25 years old, happily washes whatever I throw in there and has never had a bad smell. I clean the lint filter maybe once a year and once found an earring, ruined so badly and a couple of coins, maybe a tiny bit of fluff.
Greasy/oily stains such as spatter from cooking, get treated before the items go into the machine, sometimes with a spray bought for that purpose, but usually by pre-washing the stain with good old-fashioned yellow laundry soap. Pockets get emptied before I even take the clothes off, except for that one time I wasn't well and a tissue sprinkled itself liberally over every single thing in there.
I wash with warm or hot water, depending on what I'm washing. Sheets, pillow cases and dish towels get hot water. Everything else gets hottish, a bit warmer than warm water. I don't have anything delicate enough to need cold water or hand washing.
So how does a machine get greasy left-behind grime and a bad smell? Do any of you have that problem? I personally don't know anyone who does.