Hi there,
Having had 3 prostate operations I can assure you that they will not affect
the washers!!!!!!!!
What is more likely is the filters in the washer reservoir are clogged up.
Remove the reservoir (be careful removing the tubes from the washer pump at the outlets as the plastic pipes tend to break )
Then remove the gauze filters and clean, also clean the bottle it will be full of crap.
There should be a' how to' on ths site .
Regards,
Lez