bottle drying help???

Kayla • 20 with the most perfect family. Blessed with one handsome husband and one perfect little chunky 9month old baby girl.
Okay so I bought a dr.brown bottle sterilizer and yesterday I used it for the first time. Worked great by the way! I let them air dry upside down on the rack I got. But this morning I am seeing that they are still wet! Did I do something wrong or do they just take forever to dry? I used a cloth to dry the inside of one and it left little pieces of it inside the bottle so I quickly re washed it. FTM so any advice helps.