Same here. Pretty much any person with ME/CFS has this problem -- it's almost diagnostic like PEM. At my best, I was a 5 and even then could only shower every other day. Now I'm a 2, and I've had 3 showers in six months. I have one unit of energy every other day to carry out one smalll task: I can do one load of laundry, or sit at my desk for 20 minutes and pay bills, or spend 10 minutes standing up in the kitchen making a quick chili, or spend 10 minutes running a stick vac (the regular vacuum is too heavy) etc. A shower is just not worth it -- it would be all I do! I'd rather have a quick sink bath and occasional sink shampoo, and get other stuff done. Oh, and I sit on the toilet seat and dry my hair with my head tipped foward, much easier on the arms!