This is an usual question, I have a hot tub ... That is potentially having issues with PVC tubbing apparently manufacturer have used to much lubricant which is now contaminating water.
I found two solution one is to lower pH to 4.00 for 24 hrs and flush the tub.
Second use Jet dishwasher detergent.
Can this works ?, any suggestions how to eradicate the problem.
I know there lots of smart people here..