Stlboomer, I have worn aids for 30+ years, so I have definitely found things that seem to maintain the performance of my aids. I feel that your audiologist is actually RIGHT ON, except I’d add a few:
Buy yourself a proper UV/dryer unit. I have 3 that work dandy: Dry 'n store’s Global II, Widex, and AudioDry. These units will gently dry and sanitize your aids with a daily cycle. I pop mine in at the end of the day and have found ear itch greatly reduced. Some units are small enough to travel with, so I am never without one!
If you swim, not only remove aids AND the batteries (or they may squeal in your locker!), but also wear earplugs to keep ALL moisture out of your ears. I recommend TYR plugs for the best fit!
As long as you don’t get moisture INTO the aids, it’s perfectly fine to wipe them down with an alcohol prep pad (or the wipes).
Hope you are overall happy with the aids - let us know the brand you are wearing.