Faraaidh and Sunnats of ghusal

Ghusal after an operation

Q: Wanted to ask, recently had keyhole surgery and was in haidh but now need to take a bath to become clean. Because of stitches been told not to get that part of the knee wet. Would running across wet palms across that area suffice for ghusal?

Mango string getting stuck between one's teeth

Q: If a mango string is stuck in my teeth, I did my best to clean my teeth before making ghusl mindful that all mango strings are taken out, after ghusl I read salaah and quraan. The next morning I ate thereafter I cleaned my teeth again and I found a small single mango string from my teeth. Is the ghusl, salaah and reading of quraan valid? The mango string is as thin as hair.

Waswasas regarding ghusal

Q: In ghusl of janabat water must reach under finger and toe nail? After every ghusl I get different kinds of doubt like water is not reaching in my mustache or anything. What can I can do? I suffer waswasas after every ghusl. I am facing a lot of doubt. In ghusal janaabat, if I forgot washing any part of the body what can I do?

Ghusal

Q: If I take a bath and clean my nose and mouth in a wudhu way, would it be considered to be wudhu? If so then shall the water reach all parts of my body while bathing? What about ears?