Tahaarat

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?

Lizard droppings on a wall

Q: As we all know that almost all houses have lizards. My question is: 

1. Lizard's dropping is found on the wall and it has dried. If we paint the wall and the brush touches the impurity, does it make all the wall with new paint impure? 

2. If this wall with new paint dries and someone with wet hand touches it, but the traces of color is not visible, will his hand be pure?

Mazoor woman changing her liner for every salaah

Q: I consider myself a mazoor (excused person) due to chronic vaginal discharge. Nothing excessive but I have leaks especially during prayer. I wear panty liners to absorb the discharge. Sometimes theres a lot or just a few drops or even none (between prayer times). Example due to work I pray Zuhr at the end about 10 minutes before Asr. I still do a new wudu for Asr even though the time is very close. I do a new ablution for each prayer.

My question is, do I have to change the panty liner for each prayer? Or can I keep wearing the same one for 2 or 3 prayers?