Istibra

Q:

1. I have asked many question regarding mazoori but I still have one doubt. I am suffering from urine drops problem and I am a mazoor. I wanted to ask after washing my private part during istinjaa, can I dry my private part with tissue paper? Remember I am a mazoor and when I try to dry my private part with tissue there is water and urine both mixed?

2. Because I am a mazoor, I keep tissue paper for example after performing istinjaa. I keep tissue make wudhu pray Asr and then I recite Qur'an and when maghrib time comes I only renew my wudhu. Will my Maghrib Salaah be valid?