Measure for mold smell

Unendurable strange mold smell obliged me to remove the origin of the failure, all the insulating material was peeled of and stripped thoroughly yesterday. Piled trash occurred bad odor as imagined, this kind of inconvenience happens on classic cars being struggled to measure, there is some tendency that the phenomena is proportional to the age of production. There is no easy way to measure the problem well except eliminating the source of the origin---mold living somewhere in the cabin, it might haunt in seat cushioning material deep inside?
Removed insulating material is utilized to copy and duplicate the same shape on the prepared rubber sheet. As the applications of this insulating material must have been designed by the original VW engineer after some adequate experiments and researches, no omitting of these important parts are allowed to establishing good compliance for NVH concepts and principles.
As my garage has no air conditioning system except fan, working here is just like in a Sauna bath in this Summer season, early in the morning and after sunset are the times to do.