1) If most of my clothes are najis because non-muslims’ wet hands have manipulated them, and now it remained no visible trace of the najasa on them. Is it necessary to wash them before placing them in the washing machine. Or would the cycle of the machine machine be enough?

2) I have the habit of washing my najis clothes (especially with najasa that does not have a mass like non-muslims wetness) in the washing machine to render them tahir. So when I do that, can I use laundry and fabric softener in the program, or the water would then be considered mixed water who does not purify my clothes?

1) Cycle of washing machine will make it paak

2) Make sure first remove the najasat from cloth then put in washing machine then yes you can add soup or liquid whatever you are using for washing