Dry indoor air during winter can lead to crispy leaf edges, reduced plant health, and potential damage to tropical houseplants. Over-humidification may cause condensation, mold growth, and water damage to surrounding surfaces. Improper use of humidifiers or controllers can result in inconsistent conditions, negatively affecting plant growth. Additionally, excessive humidity without proper airflow can lead to persistent wetness, which may harm plants like orchids. Homeowners should also be cautious about maintaining indoor humidity levels within recommended ranges to prevent structural issues such as window condensation.