go to walmart and get a humidifier, or add a few airstones to your container of water, just like you would to add humidity to a shroomgrow
Ill trade you growrooms, mine was around 80% and i had tons of mold in my buds before i got a dehumidifier, my humidity never gets lower than 50 to 60% where i live, so a dehumidifier is a must, 29% sounds nice.