I'm sorry to give you the bad news but when it comes to MPB it doesn't really matter if you wet your hair in the shower or not. If the 5AR enzyme ever finds your way to the AR receptors In your folicles, that means your hair will go off at some point regardless of the daily care you give it.
I once thought that using a specific shampoo caused me hair loss then I switched and it only got worse. Switched it again until I realized that the issue was way deeper than I thought. Don't make the same mistake, stay on course and protect yourself from the need of getting a surgery if possible. Give 1 or 2 years to meds before commiting to surgery and listen to what @Gatsby said.