I bought a stubby antenna off Amazon a year or so ago and I have gone through 10 to 20 car washes since then and never had a problem.
I do check it now and then and ,make sure it is not loose.
I was purely interested in sound quality. I did not care that it was louder.
That being said, I do not see a major improvement in the speakers. The B&O speakers are actually pretty good for an OEM product.
I wish I would have just bought some better tweeters and put them in myself.
I put in new Focal door speakers and tweeters in my Lariat.
I want to sell the factory B&O speakers.
Make me an offer.
I will ship them in the USA.
PS the speakers are in great shape and sound good!
I have the same issue with my trim, too.
I only really notice it when I wash the truck.
I agree with other owners that I am afraid it could cause more issues if it is messed with.