It is Oct 4th. I calked window sills, door frames, and where the drywall meets the vanity in the bathroom two days ago. The caulk is still not dry, and the caulk in the bathroom has cracked. Any ideas as to what is keeping the caulk damp (we are in Houston, but the humidity has been very low) and what may have caused the caulk to crack? My wife says the caulk may have been old...she's right there. It has been quite a while since we last used the caulk. Any thoughts are appreciated. Thanks.