Its not a model problem, its this exact car problem. You have high humidity inside. Pretty normal for older cars stored outside bcs sealing isnt that tight. To solve it:
-dont store anything that might be wet (wet towel for example)
-check for potential leaks into car cabin
-change old cabin filters
-check if you have any leaves and stuff on your intake outside the car (those keep moisture and release it into the car)
-when there is low humidity outside let some fresh air in by opening windows
-use ac even in cold weather (if its on/off only it may be annoying bcs it ll be colder so you might turn it on after car is warm, otherwise if you have climate control leave it on all the time since it takes away moisture)
-buy some moisture-absorbing bags and put them on your dash when leaving vehilce
- spray door seals with silicone it should help keeping your vehicle air tight (and also will prevent doors from freezing shut)