After action, and then found that the action must be made more is due every 30 days lang still not enough clean, so it must have clear coil. Every 2 weeks because it found that after cleaning and then after two weeks have growth again.
After action was found to be the action is more because of the lower every 30 days is not enough to clean it needs to be washed coil every two weeks, as the latter cleaned after two weeks with the growth of microorganisms. more
After action and found to action is more, due to clear every other 30 days, there was not enough clean must have a clear coil. Every week, because 2 found after cleaning and after two weeks are growing again.