This is the first year closing my pool in a new house. I have an in-ground pool with liner over the pool steps. The liner was just replaced this past June. Someone told me that I should always keep water level above the top step to prevent the liner on the top step from drying out and shifting. The pool company I'm using to close the pool told me that I should lower the water level 2" to 4" below the skimmer box. This will put the water below the top step. Is it safe to lower the water this much? I am using a solid safety cover with a cover pump over the winter if that matters.