I suspect my tenant is subletting a portion of the property without my knowledge or consent, which is a violation of the lease. I've seen new faces coming and going.

Use fans to keep air moving and reduce the likelihood of condensation forming.

Consider insulating cold pipes or windows if they are contributing to condensation.

Immediately inform your landlord about any suspected water leaks for professional repair.

Check around pipes, under sinks, and the base of the shower/tub for any signs of water damage or active leaks.

Use a dehumidifier if necessary and wipe down wet surfaces after use.

Ensure the exhaust fan is functional and used during and after showers. Open windows when possible.

If direct negotiation fails, consider involving a neutral third party to help facilitate a resolution.

Arrange a dedicated time to discuss the rent increase calmly and professionally, allowing both parties to express their viewpoints fully.

Offer to sign a longer lease term in exchange for a smaller rent increase, providing the landlord with stability.

Offer a rent increase that is lower than proposed but still reflects some market adjustment, demonstrating willingness to meet in the middle.