Clothes smell and I feel like I've tried everything

are you removing washing immediately from the washing machine when the cycle has finished?

you say you dry them on the landing ... is it possible that they are taking so long to dry now its winter and they are remaining damp then start to smell , like a damp cloth does or damp mop? - have you a Tumble dryer? , not only will they dry quicker but also as they tumble through the hot air they will deodorize and (if the heat is enough) will help kill the germs and bacteria. - if a vented dryer through a wall then the odours will expel to the outside air with the moisture.

Could also try taking off the grey waste pipe from the washing machine under the sink and put it into a big bucket and do a rinse cycle, at emptying it should be a nice strong stream of water coming out of the grey washing machine pipe into the bucket.

then put a bucket under the sink where you have taken off the grey washing machine waste pipe and run the tap into the sink. Is the water going straight out to the sink waste on the left there? - there should be no water at all exiting at that pipe where the grey washing machine waste attaches to. if there is you could have a blockage in the u-trap under the sink or a blocked drain after the sink at your house.

Just a few other things you could try/take into account.

good luck.

Assuming the washing machine is functioning OK, and agitating the drum, finishing without errors in the expected timeframe, and assuming you are not using quick wash cycles (which are rubbish), the answer is likely to be somewhere in the following articles -

laundry not being cleaned properly

5 things you need to know about washing at 30 degrees

washing machine smells causes

washing machine detergent issues

No, the smell is just on the clothes.

That's a much better photo thanks, aye it looks deep enough. The drain hose is attached properly too and going up and over before running down to the washing machine. Can you smell the smell inside the washing machine, or in the cupboard?

No, I just wanted to confirm it's pointing down as well as it being positioned correctly.

So for a certain time have you had the waste pipe from the washing machine machine pointing up then? - this definately would have mean that everything that has gone down your sink has ended up going down the grey flexible pipe heading towards your washing ... which would not have been good!

I've done a hygiene wash. The water is from the cold and it's from the mains, not a tank. The water inlet is connected under the sink and it's right next to the mains feed.

It doesn't look particularly shallow. What do you think?

Smells could be caused by the washing machine inside but you seem to suspect it's related to drains and plumbing so I'm concentrating on that for now. Check out my article here for possible help - Smells caused by plumbing faults

Hi. It may not be anything to do with the u-bend, but it's worth ruling it out first. Is it like this one?

Ideally it should be fairly deep like this -

The u-bend should be completely full of water when all water has stopped running through it. No air should be able to get past this water, that's what prevents smells from the drain coming back up. I'm just wondering if it's not a proper u-bend then air could get past the water.

hi there I see you say you have tried washing at higher temp but have you actually initiated a maintenance wash since having the machine ?

Most machines have a 'maintenance wash' or Drum cleaning setting. - This is a wash cycle very hot (around 90'c) and lasts a long time (could be up to 3hours) and spins the drum around very quickly as to "scrub" the inner and outer drum , hopefully getting all the sludge from previous washing detergent loose and then thoroughly rinsing with clean cold water.

you should initiate this drum cleaning without any garment whatsoever (so empty drum) and using no soap detergent or powder and no fabric softener.

and lastly is the water that is entering your machine entering from the cold water mains and nice and clean, and not from a tank in the attic or from a well?

This is the waste. It does have a U bend. I've tried to draw it how it is.