I like the stand alone dehumidifers better than ones incorprated in to hvac system. When you place the dehumidiferes in the conditioned space they sense the RH in that space, many central dehumidifiers sense the RH in the area they are located in and do not dehumidify the conditioned space as well. Where are you located? Where are central units located? Have you talked to hvac company about adjusting dip switch settings? Many times they are installed with factory settings and need to be adjusted for your climate. ERV's are usually not for cold climates..that would be an HRV, so I wonder about your location. Also ERV's are for 'tight' houses..with less than .25 air changes per hour. If your house is not at this level of air tightness the ERV can bring in moisture adding to the dehumidification load of hvac. Was the house tested for air tightness with a blower door? To 'see' what is happening behind the walls and between floors of your home would require a thermal scan of your home. This will show you moisture intrustion sites and moisture in walls, ceilings and floors. IMO this will be the way to go to actually KNOW what is happening. Then whatever the IR scan shows will be on you to address. Around here (Louisiana) thermal scan (InfraRed) scans are used often when home owners and builders are seeking solutions. I've even seen them used in court cases. But hopefully...it won't come to that! best of luck.

I have an older Duet WFW9750. I always wash my towels using the Whites cycle on hot and with the extra rinse. Generally the light soil level is enough. I usually wash 10 towels per load. No odors here, even with wash cloths. However, I will say that when I attempt to wash the same load using the same setting but using warm water, my towels do not smell nearly as clean. Also, the Normal cycle is a no go for towels! As always, I highly recommend washing your towels as we all have suggested, but also adding 1 cup of ammonia to the dispenser after the machine is done filling, approx 5 minutes. It should remove any body oils or other residue in the towels. Just be sure you are not using chlorine bleach in the same cycle! Keep us updated!

So it might be getting better. ServPro came out and noticed that they didn't cover the sewer hole. They covered it and the smell dropped about 70%. But I would have thought that the sewer would have had a whole different rank smell, not so musty. I asked them if they treated any mold and they said no because the amount of mold was not significant enough to warrant calling in the mold team. If it still smells when they come back, I'm going to demand that they treat the mold. I had a mega moldy wall in our laundry room/garage that was covered in mold to at least 4 feet high. I removed the drywall and saturated the remaining studs (which also had visible mold) with hydrogen peroxide. I did it about 3-4 times over a few days and now our laundry room smells great. No musty smell at all. Literally, the laundry room is the best smelling place in the house right now.

The musty smell is from mold - some of which may make you ill. Good that you stopped the leak but without further investigation you don't know how much hidden damage there is. There are ways to remediate the smell but even a slow leak can damage underlayments and structures.