Answered by Shaykh Faraz Rabbani
If semen is on my clothing and I wash it. If the clothing comes out clean and the substance of the semen has gone but a stain can still be seen where the pollution was, is the clothing considered clean? If not how many more times do i have to put it in the washing machine before it is excused?
Walaikum assalam wa rahmatullah,
I pray this finds you in the best of health and spirits.
1. If one washes semen from body or clothes and the substance itself is removed, then traces that are hard to remove (namely, anything not removed by a regular washing) are excused.
2. While it is permitted to put ritually filthy clothing in washing machines, it is religiously superior to wash away the filth first under the tap.
Please search SunniPath Answers (http://qa.sunnipath.com) for related answers on the fiqh of washing machines.
And Allah alone gives success.