If you can't find ear plugs you could use cotton balls. They won't be water proof so just don't keep your head under the water long and it should be fine.
When i broke my wrist and the doctors bruised my arm I went to a salon place and just have them wash my hair.
I will have to look into those! I'm not sure if we even have those wax ear plugs here. I live on a small island in Alaska, so we only have grocery stores.
Theres dry shampoo that works I know elderly people use it that might be worth a try
Just go buy ear plugs. They make wax ones that will form to your ear and keep the water out.
If you have a walmart around I think you can buy a none water shampoo/bodywash. Its for like campers. I used it when I had surgery and it worked. I can't remember the name of it sorry. But you can look into? I'll try and find the name too!