Those things which render the Salaah invalid

Seeing blood on one's clothing after Salaah

Q:

1. If one finds his garment stained with blood, would he need to repeat his salah performed while wearing that garment? (bleeding due to shaving unneeded hairs and ghusl performed after that). Would his wudu be broken due to bleeding and will the clothes be considered napak? The stain was less thn an inch in all dimensions.

2. If the salaah needs to be repeated, would only the Fard salah be repeated or sunan and nawafil as well?

Looking in the Quraan while performing salaah

Q:

1. Is it permissible to hold the Quran in one's hand in Salah for reading so that one can read unknown surahs after sure fateha.

2. Is it permissible to read the whole tarawih prayers (alone) and in other prayers.

3. If not, could you please tell me why we should not do it.

4. Why do people in the haram hold the Quran in their hand and read or read from the phone in their salah.

Performing Salaah with a sweet taste in the mouth

Q: If your mucus/phlegm has become sweet because of something sweet you ate then will it be okay to pray in that condition? Like in Ramadan when everyone drinks milkshake and eats dates when they break their fast and then they just wash their mouth out with water and stand up for Maghrib Salah even though their mucus is still sweet and the back of their throat is still sweet. Sometimes your mucus remains pink even after you wash your mouth out. What happens if you swallow this pink mucus during salah? Is it sufficient to quickly rinse out your mouth with water before salah or should you wait until the sweet mucus goes away? Sometimes I only break fast with water then eat after I pray to avoid this problem. What is the best way to deal with this?