Impurities on clothing and furniture

Q: I had a dirty wet wipe on the floor. As I picked it up, it touched my duvet. Would I need to wash my duvet?

Q: My 3 month old son had a portion of his clothes wet with urine. I removed the onesie and placed it carefully on the bed with the urine part facing upwards so I could wash it. 

I fed my son and when I was done I picked up the onesie and went to wash it. Then I saw the onesie was completely dry all over and I couldn't find the spot where it was wet previously. 

Can I use this onesie now or must I wash the whole thing?

Q: As we all know that almost all houses have lizards. My question is: 

1. Lizard's dropping is found on the wall and it has dried. If we paint the wall and the brush touches the impurity, does it make all the wall with new paint impure? 

2. If this wall with new paint dries and someone with wet hand touches it, but the traces of color is not visible, will his hand be pure?

Q: If some impure drops fell on my mobile and I just cleaned it with something and it vanished from the screen or is it necessary to wash or wipe it with water?

Q: Is washing soiled impure clothes with semen and such in 40°c water with 45 min wash in the machine sufficient to make them pure? Even if u may still see stains.

Q: Is the moisture on the inside of the opening of the urine hole najis? Because this opening touched my underwear, like it unfolded and rubbed against my underwear on accident. No urine came out. It was just the urine hole but of-course this area is naturally wet so is it najis?

Q: I was wondering if it will be permissible to use antibacterial spray such as detol or zaflora to remove najasah on surfaces like doors, door handles and radiators by spraying and then drying with tissue paper.

I also read in a fatwaa that if the spray causes side effects you cannot use it. The sprays I have say they cause eye irritation. Does this mean I can't use it. Can you please respond as I need to know cause it will cause me alot of difficulty cleaning the radiators without spraying them and having to use a wet piece of tissue then a dry one. I also feel if I use a wet cloth I will just spread najasah everywhere.

Q: I travel for work and sometimes my agent takes me around in his vehicle. There are times when his vehicle has some dog hair on the seats and on the floor. By me sitting on the seat, some of the hair may come onto my clothes which I try and remove. Can I read salaah or are my clothes napaak? 

Q: I was putting my wet clothes into the dryer, the bottom of my pants touched the floor, I then put it into the dryer... Was it napaak? Did I need to rewash it? If yes, are all the clothes that got dried with it also dirty?

Q: I once saw some white residue on my washed pants. Our clothes washed in the washing machine never have detergent residue. I don't know why my pants had that. The problem is I didn't know which other clothes were washed with the pants. Are all the clothes impure? Should I repeat any salah?