Embroidered inner letters

Mazda 323 F, BJ 2001, with air conditioning Hi, am new in this forum. Problem: the Mazda has been annoying since the beginning with foggy windshield (inside) from autumn to spring. I’m tired of wiping or ice scraping inside in winter. The car is outside, partly unused for 1 week. Car was already 2 times in contract workshop, once with air conditioning maintenance – everything without success. Floor already checked several times itself => always dry. Also in winter for some minutes air conditioning switched on t while driving => doesn’t do anything either. Inserting moisture into the car through wet clothes can’t be the cause either. Does anyone have an idea what it might be about? Possibly on a pollen filter, where I have no idea if my car has such a filter. Thank you.