Sehri and Iftaar

Q: Is it obligatory to floss after eating when a person is fasting? Sometimes food can get stuck and I can't feel it there.

Q: I’m fasting. I try to follow the most accurate sunset times. Of course these different sites and apps make estimates of what sunset time is. For e.g, today one would said sunset is at 3:53, another two said 3:54 and another site said 3:55. I naturally would follow the latest one as a precaution, but nevertheless, would it be permissible to follow the earliest time?

Q: I woke up this morning and drank water after fajr. Not realizing I needed to fast today. However, since then I haven't eaten or drank and want to keep my fast. Would it be accepted? I didn't know I had to fast today and a friend told me. 

Q: If I keep my qaza fasts and nafl fasts without eating sehri, will the reward be less?

Q: How we can decide when it's the right time to stop sehri?

Q: What if one breaks the niyah of روزہ قضا after azan of fajr because he wasnt able to wake up for suhoor. 

Q: If a person thought the athaan went off while fasting in Ramadhaan (he heard the athaan on the radio or someone gave the athaan as a prank) and he broke his fast is the fast valid?

Q: Sehri time till is 04:03am but I not knowing ended my sehri at 04:10am. Later I found the correct time. Is my roza valid?

Q: Can I break my fast without listening to the Azan at Maghrib time? E.g.: I'm traveling and I don't have the facility to hear the Azan.

Q: I have some questions about fasting. Could you please answer them when you have time Insha Allah?

1. During Ramadan, is it enough to make intention to fast for the whole month or it must be done for every day?

2. If it must be done for each day, when must be the intention done? Please don’t use difficult words that I won’t understand, could you please say from magrib till fajr, etc, as I find it difficult to understand the explanation other alims gave on some sites I read. Could you please give time frame for intentions for Ramadan, for kazas of Ramadan, for fasting 3 days of breaking an oath and for nafila fasting every Monday, Thursday and 13, 14, 15 of each month – is the time frame of intentions the same for all these fastings?

3. What if one forgot to make intention during the prescribed time, what must he do, fast anyway and then make kaza, kafara etc?

4. What if one is fasting his Ramadan kazas after the next Ramadan is finished only, what is the time frame for the intentions then, the same as normal Ramadan kazas?

5. What if I fasted one (or more) day and then realized my ghusl (I speak only of ghusl after menstruation, not after wet dream, etc) wasn’t correct, is my fast still valid in shaa Allah?

6. If I miscounted end of my period and made ghusl too early, but started fasting after day 10 of period (as max can be 10 days) is my fast still valid or not in shaa Allah?

7. if it is not allowed to insert cotton balls inside during fast when I have discharges, does it mean I have to be checking with a mirror every time if they are there and find that moment when they stop for a while or the best would be just make salah close to the end of its time even if then discharges are flowing?