The problem with deteriorating fabric in the underarms of your shirts have nothing to do with...
* Dry cleaning process vs shirt laundry process
* "Professional" processing vs home processing
* Scrubbing underarms with a brush
* Tight fit or swinging of the arms
* Cleaners pressing equipment.
Kuddos to Raoul Duke who opined that the problem is caused by "sweat/deodorant".
The problem is caused by:
* Acids and chloride salts present in perspiration, and
* Metallic salts present in anti-perspirants.
Shirt laundry is an immersion process and the entire shirt is subjected to the SAME process. Yet the problem occurs in the underarm area only. If it was the laundering process, the same problem would occur in other areas of the shirt as well.
Unfortunately, it's impossible to know PRIOR to laundering whether the already slowly deteriorating fabric will deteriorate to the point that ANY stress on the fibers caused by the tumbling in the washer wheel will cause the fabric to tear.
I have seen this problem before. It's currently limited to about 6 specific clients out of many hundreds. One client specifically mentioned that he used Mitchum. In all cases, I solved the problem by soaking ALL their cotton shirts overnight in a solution of ammonia and water (1 part ammonia to 5 parts cold water), rinsing gently, hang drying, and then processing as normal. The effect of the ammonia is to neutralize the acids and salts.
I'm sure that you can't rely on your cleaner to do that every time. So your'e going to have to do that yourself prior to turning your shirts over to the cleaner. Soak, rinse, hang dry and only then drop them off. You'll have no problem in the future.
For further information on this subject...
Blog post: Are the underarms of your shirts deteriorating?http://www.ravefabricare.com/true-qu...riorating.aspx