There are steps you can take to speed up the drying process. First, if you can wait until fall or winter, it is best to apply paint when the humidity is low. When the humidity is high, air has a harder time picking up excess moisture from paint, thus slowing the drying process. If you can't wait until there is less humidity, you could purchase or rent a dehumidifier and place it in the room which has been painted. You can also use fans to help dry paint.
Fans serve several purposes.
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