What is the ruling on the wetness found on the toilet seat if it gets on one's clothes, and what is the ruling on the sweat resulting from this wetness, and is it obligatory to wash the places that were sat upon?

If you give in to obsessive thoughts and obey them, you will fall into severe hardship, which achieves the devil's purpose. You must seek refuge in Allah through supplication and remembrance. Sprinkle the area where the obsessive thought occurs with water, and convince yourself that the wetness is from the water, not urine. If you doubt impurity, the default is purity, and do not pay attention to obsessive thoughts. If you are certain that urine has touched a spot on your clothes, wash that spot and the areas that the wet garment has touched. If a person sweats on an impure spot, whatever part of their clothes comes into contact with it becomes impure. If the location of the impurity is known, only that part is washed; if it is hidden, the entire affected garment or bedding must be washed.