I recently purchased a M4-2 from another forum member. For the last few years I have been using a Artist and Artisan half case on my M4 and decided to add one to the new camera as well. Order one from B&H and it arrived in record time. When I opened the box it had the musty smell of a leather product sitting in a damp warehouse for a long time. A smart person would have begun the return process immediately but I really don’t want to receive another copy that has been sitting in the same warehouse. The normal answer of letting it sit in a sunny window are on hold as our weather has thrown the switch and transitioned from unseasonably warm with plenty of sun to damp, dark and rainy. I’ve tried baking soda, vinegar, leather cleaner and even dryer sheets. Currently it’s in the dryer on a no heat cycle for a couple of hours. I know the smell will diminish with time and I will contact B&H but this is a great resource for stuff I haven’t tried.