Tinea pellionella are carpet moth lavea in a cocoon case they look like tiny bullet shaped cotton bud tips with open ends and the creature sticks its head out and can move the cocoon usually up walls and are often found in the bases of divan beds.
They live on natural fibres, and often mattresses are filled with horsehair and wool, especially the more expensive ones, which is ironic. These creatures can live for up to two years in that state eating the inside of your mattress rather than the content of the wardrobe because of the supply of natural fibres in the mattress. Also the carpet moth as it is commonly called does not fly about it moves on the floor and therefore woollen carpets or part wool carpets are at risk as well.
These creatures live in dark places usually where furniture is not moved. Hence bedrooms suffer with this type of infestation more than other rooms, because divan beds even if they are moved are never turned upside down to check the base where I found hundreds of these things inserted into the base hessian cover.
We had been searching for the source for ages, hoovering and cleaning the carpet washing down walls and cleaning out the wardrobe on almost a monthly basis to check. It never occurred to us to turn the base of the divan over.
We also found that these things live under the carpet as well, so pull the carpet back and treat under both the carpet and the underlay, and if you can afford it throw it out if you find some.
Steam cleaning the bed base after hoovering out the cocoons and then spraying with a good quality moth spray is the only way. It is nice to use non chemical products but sadly if you want to rid your home of these creatures and save your carpets, clothing and sleep on an un infested mattress then this really is the only way. It is difficult if you have children and animals to know what is best, but there are fumigation 'bombs' that can be used after cleaning out if that is a better option for some people, that means your chemicals will have done the job and dispersed in a given time, rather than a spray or powder that remains.
The mattress although looking perfectly OK had to go and we cut it open really to justify what we were doing and sure enough there were thousands of these cotton wool type cocoons in the horsehair and lambs wool filling of the bed. Horrifying. The mattress cost a fortune, because of these natural fibres. We now have a completely man made fibre one. No wool in the carpet, and my clothing in the wardrobe is all bagged, its really inconvenient but until we are sure that there is not one single pair left to develop into a breeding pair we are willing to put up with the inconvenience. I can hardly believe that the bed that I so loved to sleep in was a hive.....makes me shiver.
I hope this helps if your searching for the source of your disappearing natural fibre furnishings. Also don't forget to check out the underside of the couch and armchairs.. the same thing applies if they are filled with natural fibres.
I also use to sleep with the window open, but after reading that these breeding moths can get in at night and start the cocoon process off again, I sleep with the bedroom door ajar to let some air circulate instead.
There has been some suggestion on one website that these moth lavea can be already in the mattress and divan base when they come from the factory. The raw materials of wool and horsehair being open in the factories prior to being inserted into the mattress...it could be. We had so many that I think that could be one explanation. Makes me shiver to think about it.
We seem to be all clear now, but I am constantly checking, and steam the carpets and beds frequently, including the underside of the divan base to be sure and check that nothing is in the new bed base. Mattress of course now natural fibre free so no worry there.
Good luck if your still having these issues. I know the thread is quite old, but you may still be watching.