Persistent mold and mildew smell, even though door is kept open and I live in an arid climate. Any solutions?

depending on the size of the area buy 1 gallon,2 gallons or 3 gallons for large rooms,motor coaches, etc of WHITE VINEGAR which usually costs $2.25 to 3.00
per gallon. Spray lots on anything that is mildewed, moldy of has fungus growing.
the white vinegar will kill mold,mildew and fungus, within 30 minutes ,on contact.
The white vinegar will not stain clothes,carpets ,car seats or uphostered chairs however, i would keep it away from finely finished woods as it might possibly affect the fine finish. It probably wont, but test a small area that is not conspicious, just in case there is any reaction.
the white vinegar is often used in salid dressings , so aside from the room or car or your clothes smelling like salid dressing for a couple of days , no other side effects. the smell goes away, even from areas that you drenched in white vinegar, in a tops of 3 weeks. If you need the smell to go away faster, open all windows and direct a 20 inch box fan at the smelly area. anyway,the vinegar smells a lot better than the mold & mildew. It will save your cloths,your bed,your car, your interior rooms in your house, basements,garages, wood sheds, even wood lumber, that has been left outside too long, as long as the wood is not rotten.
The easiest way to apply the white vinegar is full strength and just pour the white vinegar right from the bottle into a 1 gallon pump up ortho sprayer, and spray your mildew room,rug,car seats,motor coach,basement,clothes or whatever. I has two rooms in my house get a good soaking in that big hurricane 2 years ago, sandy, i think it was called, and 3 days later the mildew smell was so bad i couldn't stay in either room. So I let everything in the room have it ,liberly, except for the tv set,which i kept dry.
The next day,i could only smell the mildew very faintly and the vinegar a lot,so i opened the windows and turned the 20 inch box fan on. I let the windows open 24 hours with the box fan on, after 24 hours, i could still smell a little vinegar,so i turned off the fan but left the windows open for another day. I was able to go in & watch tv again, but had some of the vinegar smell, not bad, but i kept looking for a salid to eat. 2 weeks later,the vinegar smell was completely gone but i noticed a faint mildew smell from the rug, so i gave the rug an even better soaking with vinegar. I had not applied enough vinegar to the rug to get down into the underpading where some mildew had survived and started to grow again. after the second application to the rug, It again took 3 weeks for the vinegar smell to disappear but the mildew smell was gone forever. The vinegar did not stain anything and i even applied *** to cloths that had gotten mildewy smelling in a leaky closet. 24 hours after i sprayed the clothes,i washed them and am wearing one of the shirts,restored to like new, as i type this. So,sometimes,you need a second application. sometimes you dont.one spray will do if you dont have rug underpading that needs to be really soaked good.
I have used the white vinegar on lumber left outside,sprayed it good and came back in 3 hours ,after it dried and started cutting the wood to fit on my mail box mounting. This stuff really works good.try it and i am sure ,you will like it.

Cheapest way to apply white vinegar is to empty your windex bottle into a jar,fill the windex bottle with white vinegar and have fun pumping the trigger about 400
times. works good for small areas if you dont have arthuritis in your hands.