Impurities on clothing and furniture

Q: Allah recently guided me to the right path. I was an undutiful Muslim. My question is about impurity. You know that if some impurity touches to your clothes or other things, then you have to wash. When I was not practicing Islam properly, I used to not wash my penis with water after using toilet. Also, I never used to remove semen from my clothes after wet dream. When those impure clothes used to wash with pure clothes in washing machine then obviously those clothes also used to became impure. Now what is the solution to purify all clothes. There are a lot of clothes. When those clothes touch another thing, then they could also cause that thing to become impure. So, as a whole I believe that almost all things in my house have become impure including clothes because I was not conscious about impurity. How to purify my house? My mother will not wash all clothes. I am really worried about this.

Q: While putting clothes with najaasat on them in the washing machine, some of the clothes touched the outside of the machine. After washing, while taking out wet washed clothes, some part of the clothes touched the same spot of machine where najis clothes touched. My question is, did my wet clean clothes again became najis and should I wash them again?

Q: How many times we should wash impure clothes in an automatic washing machine to make them pure? Washing once in a fully automatic washing machine is enough or not for making clothes paak (pure) or I need to wash three cycles?

Q: If I found some mazi drops on my underwear after Salaah and don't remember exactly when it came out. Is my prayer valid?

Q:

1. If I see a wet dream and I am wearing a pad, does it make the bed sheet najis if there are no signs of impurity on it? Should I change the bedsheet

2. I keep my scarf for prayer on the same bed. Has it become najis?

3. If I put clean wet or dry clothes on the same bedsheet, will they become impure?

Q: My mattress got soiled by urine twice. I tried purifying it by pouring less than a kurr water over the places. Can it be considered paak?

Q: My question is on behalf of my colleague. He is having a problem since 6 years. His life is in danger as his parents are not with him. His parents are in India. He lives in his uncles house. He told me that one day he was sleeping without going to toilet and he urinated while was sleeping in his bed. He is very shy to wash his bed sheets because he will be asked by his uncle and aunt. After that he washes his hands regularly and they thought he got ocd because they don't know his matter. They took him to the doctor. Now he's afraid of tell them about his problem because if he wants to wash his bed sheets they say it's washed and his duvets are not clean as well. They always follow what he does. So brother please tell me what should he do now? He's always thinking about it. Please give him some advice.

Q: I wanted to know that if while talking to my wife on a video call I get some sperm spot in my underwear, is it necessary to have ghusal?

Q: To clean an impure toilet seat, is it sufficient to first clean with wet tissue paper and then wipe with dry tissue or do you have to actually pour water on the seat to make it pure?

Q: If a towel was put on the bed and some semen after intercourse went on it which then transferred to the other bottom side of the towel which was touching the bed sheet then does that mean the bed sheet is also impure? This is because the wetness of the semen from the bottom side of the towel touching the bedsheets could've been transferred. Although when checked after few minutes the sheet was dry and and there were no stains. Should I have to wash the bed sheet?