Factors that break wudhu

Q: If due to an eye allergy or tiredness the eye is burning and watering, will the wudhu break? 

Q: I have a lot of whiteheads on my nose. From what I know these are clogged pores. After ghusl, because of the heat of the shower, the white heads and clogged pores comes closer to the surface of my nose and I can brush some off with my hand. It's not watery. Does this break wudu like pus would? Or does it just count as dirt of the body.

Q: Does cleaning the ears invalidate wudhu?

Q: Does ink stop water from reaching the skin?

Q: If either the husband or wife has ablution (wudu) and they see their partner without covering or unclothed, will their ablution break or not?

Q: Does inserting a tampon break ones wudhu?

If I am a major due to istihadha, and I insert a tampon before wudhu then wear khufain, is masah on the khufain valid for the entire salaah duration or do I have to remove it and wash feet each salaah time?

Q: When a woman using a cotton ball etc. to prevent discharge, is it necessary to remove it & clean oneself before making wudu again if the wudu had broken? This occurs whilst travelling when sometimes the toilet is separate to the wudu area. Must she remove the cotton & reapply it or is she able to just make another wudu?

Q: Whilst making wudu, if a person's wudu breaks by passing wind or vomiting etc., does he have to start the wudu from the beginning again or must he continue from the limb he was washing? 

Q: There is this book called "The Tablespread Of the Holy Prophet" written by Muhammad Faisal

There is a section on cheese. This hadith is a Sahih Muslim Hadith 687, Narrated by Abu Hurayrah (radhiyallahu anhu).

"Performing ablution in the mosque, he said: I am performing ablution because of having eaten pieces of cheese, for I heard the Messenger of Allah Ta'ala say: Perform ablution (after eating anything) touched by fire."

I would like to know what is meant by "touched by fire" and why should we make wudhu after eating something that is touched by fire?

Q:

1. Does leaning against something whilst making dhikr with the eyes closed break wudhu?

2. Does falling asleep on a desk in front of a person whilst sitting on the floor break wudhu?