I had my 24' above ground pool closed this past week. They pulled out the ladder and did all the winterizing. I forgot I had purchased a vinyl mat to go under the ladder which they didn't pull out. Is it ok to leave it in there over the winter? I'm in Central NY so my pool will freeze. Thanks for any help. https://www.amazon.com/HydroTools-S...-1&keywords=hydrotools+by+swimline+protective