Ghusal

Fardh ghusal for a person who has a medical device taped to his skin

Q: There is a device on the market which is attached to the skin. It gives you a continuous and real time reading of your blood sugar levels by which a diabetes patient will know when to take his insulin and how much insulin he should take. (Not over or under administering the medication) 

The device is quite expensive (removing & changing the device each time you require a farz ghusal will be very costly). The device has an adhesive tape by which it is attached to the skin thus preventing water from reaching underneath it. Will the farz ghusal of a person wearing such a device be valid if he makes masah only over the device and washes the rest of the body?

Doubts regarding ghusl

Q: I have issues with my ghusl concerning the validity of it due to specific barriers. 

I scrub my ears yet there is still some sort of wax at the part that curves. I sometimes scrub so hard it scabs. 

I also have some white patches in the middle of my chest. I’m not sure what it is but I also need to scrub hard for it to be removed. 

I have an ear piercing hole, how do I clean inside of it, if it’s closed but sometimes some sort of sebum comes out when I rub my piercing hole which is pretty much shut. I have some hard dirt on/in my bellybutton. It is extremely hard to remove as it’s engraved in the grooves of my skin.

Lastly I have an eye issue called blepharitis where dandruff like flakes are on my eyelash and eyelid. Sometimes I finish my ghusl and see these flakes/crust on my eyelid and lash. Are the things mentioned barriers for my ghusl?

Ghusl after a wet dream for a woman

Q: I asked you a question regarding wet dreams that to what extent should I check the discharge, after awakening after having a wet dream. Should I check with a tissue or with my hand inside the lips because there was sometimes discharge of a very small quantity which was only inside and not visible outside. You replied that if there is no discharge on the surface then you don't need to check further.

I just want to confirm that you mean the visible surface here? It means the outer genetalia which is apparent while the lips are normally closed. If dischrage does not come out or visible to that area, ghusl is not fard on me? Even if its inside?