That's very frustrating. Occasionally that happens to me, but that's usually if my asthma is behaving very badly or if I don'thave enough energy to stand. Is it possible to take a room temperature or a cold bath/shower. I tend to take baths if I'm too exhausted or not breathing well, or I might just wash PTA or only wash my hair. If not, it's ok if you cannot bathe as often as most people, there are other ways to get clean enough. Dry shampoo can be store bought or DIY, a good deodorant that doesn't trigger your asthma can also be bought or DIY, and maybe even a very light perfume or cologne if it's light enough not to trigger you. Wipes can help a lot too. I hope you can find something that works for you. I understand it's difficult.