Jackson Heights
Rookie
I have about 15 cans of unopened pressurized tennis balls. I wonder how long they will last in my closet before they go flat. I won't be playing for a while. They are all extra duty felt balls made for hard courts - and are Dunlop Championship, Wilson Championship and Penn Championship. My closet shouldn't get too hot, because the temperature here in northern California usually stays under 90. Any tips to extend the life?