Hi all, I have happy news. I posted a few pages back about a mysterious white stain on the handle of my luggage BB. I sent some pictures to the SA who sold me the bag, and she forwarded them to the Paris workshop. She asked me if the stain was from makeup or lotion...I told her, neither (since I don't use either), but most likely from sanitizer.

But it was strange the white stains were only in the
crevices of the grains. I had also waxed the zipper a couple weeks ago using a small piece of wax paper, and that might also be a possibility, but I was very careful with the wax paper. So most likely, it was sanitizer.
I got a reply back in only 2 days:
"After sending photos to our studio in Paris, it's seen there has been a chemical reaction to a substance that has caused the leather to react this way. During the current climate, sanitizing lotions may have this affect.
The best option is to clean with only a very soft dry cloth by massaging the leather. But it won't be a 100% fix. Over time, the patina of the bag will help soften this as well.
Moving forward, be weary of using hand sanitizer or alcohol based lotions near leather pieces in your hand collection."
So, remembering that I had already tried gently dabbing with a damp soft cloth (the stains reappeared after the handle dried) - I didn't have much hope for using a
dry soft cloth. Last night I worked on the handle using an old soft white cotton T-shirt. For 25 minutes I massaged the handle, alternating clockwise and counter-clockwise every few minutes. I flexed the handle in several directions and tried to get into the crevices where the stains were. It looks so much better now! If you look closely there is still some white....but really you have to look. I posted a Before and After picture. I'm so happy! And I better be more careful next time.