Damp Rid...I know boring but necessary!

Hello Z'ers....Closing up the condos for the season and of course it is the rainy mildewy time of year. What is the hat trick to coming back after 4-5 months away and at least minimizing the dank, musty smells accumulating in the closed homes? Damp Rid, leave the fans on? Sachets? Baking soda? Open to all suggestions! Thanks and a great safe summer to you all