We are a month to month lease. On Feb. 15th of this month, we received a notice that our rent is going to increase, and we are going to have to pay for W/S/G, which was originally included in our rent. The letter also said if we did not sign a new lease we would have to pay an additional $50 a month. These changes were going to take place on April 1st. We decided to move and found a new place on Feb 18th. We called and gave our notice, but our landlord is saying we are still responsible for March's full rent? Is that right by Washington state law? Even if the landlord didn't give the notice of the changes before the 10th of the month?