Ramadhaan & Fasting

Q: Nowadays, we get miswaaks that are processed and then vacuum packed. However, these miswaaks have a bit of a taste. Is it permissible to use such a miswaak while fasting?

Q:

1. If a person in i'tikaaf leaves the masjid to go to the toilet, and at the same time has a shower, will his i'tikaaf break?

2. What if he has a long shower, will this matter?

3. If he goes to the shop to buy something after going to the toilet, would this break his i'tikaaf?

Q:

1. I regurgitated and I tried coughing it out but even though it felt like a lot of regurgiation, it was difficult to expel, so only some of it came past my throat. Due to the difficulty, I swallowed. Is my fast valid?

2. Also, there are times where I regurgiate and feel the contents at the top of my throat or past it, however i’m not completely sure if it can be expelled or not and i’m afraid if I cough to test if it will come out, i’ll end up essentially forcing it to come out and vomiting. So I usually just swallow it. Is this fine? I regurgiate quite frequently so this brings me trouble.

Q: I'm fasting and I noticed in the mirror after I had spat, that there was saliva on my lips but it wasn't connected by any saliva inside my mouth. The saliva that gets on my lips after spitting, is this alright and is my fast fine?

Q: Do drinks/toothpaste that get stuck in the lines of one’s tongue count as food and do I have to get rid of them? I'm afraid they might be an issue because I dont want to swallow potential food during salah and when I'm fasting. 

Q: Whenever I am fasting and feel something in my mouth but I am not sure if it is actually something or nothing, can I just swallow it? 

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:

1. Can I lick the skin outside of my lipline during fasting?

2. I was told that because spittle can unintentionally go on my lips when talking, I can lick it. Does this apply to when the spittle lands outside of my lips?

Q: I'm fasting today and I felt something come up my throat. The regurgatation felt quite full/big, however, it didn't reach my tongue. I swallowed it. Is this fine?