My guess is the curtains had mold in them. In India like countries all their buildings don’t seal. So windows draft etc. I’m not getting shots of anything. I was too sick with colitis to take the treks or I would have. Did the flight around Everest instead. Bungee jumping looks good there too. Ya if you dirt bike etc hotels will be dirt cheap all over the country. I did actually do that. I can’t vouch for the quality etc once you leave Kathmandu.