purity

Q: I am a mazoor suffering from incontinence of urine. By the blessing of Allah Ta'ala I have controlled my urine very much, but I still find a drop between two fardh Salaah times, which is enough for me to remain a mazoor. My question is if I find one drop between for example Asr and magrib, what are the rulings for me? Should I wash my private part for every Salaah, make wudhu and pray or should I only make wudhu and pray. With regards to clothing, I place a tissue in my undergarment when I go to urinate, but my question is for example before Asr time I go to urinate and keep the tissue paper and I don't remove it till after Esha Salaah and between this time I only make wudhu and perform Salaah, is there any problem in this?

Q: Could Mufti Saheb please tell me if Salaah should be repeated if one carried a child and afterwards found his clothes to be damp. Thinking the dampness to be sweat he performed Salaah. After that he found that the child's diaper had leaked and it had not been sweat.