Not sure if this has ever been raised
I am a user of the sleeper, typically twice a year , my colleagues are more frequent users. Over the last year we have all suffered from a dramatic skin irritation/itch from the bedding on the sleeper . 4 of us all experience it regularly and only after using the sleeper . We have concluded there is a different sheet material or detergent which is causing it . None of us are prone to an allergic reaction and its very specific to contact skin contact with the sheets . I can only liken it to when you get fibreglass wool on your skin . We all use the office shower after arriving and it seems to quickly stop the dreadful itchy irritation . One of my colleagues packs a silk sleeping bag liner to avoid contact with the bedding . Given this is now a routine experience and affects nearly all of us that use the sleeper, bar one , I assume others have experienced it but perhaps never report it ? It does put me off using the sleeper now and I was hoping the new rolling stock will use different bedding , but perhaps not . I would stress its only surfaced in the last year , never had any reaction before now in decades of using the service .