In addition to the fine advice above, it's important to remember that the longer you go without a minor or full resurfacing the ball's ability to displace oil effectively will be compromised.
In other words, when we resurface a ball properly we add the (microscopic) "peaks and valleys" that came from the factory. This allows lane conditioner (oil) to spread and absorb faster allowing a "cleaner" surface to contact the lane and the ball will perform better.
This is the beauty of reactive resin coverstocks, but also the double edged sword. They require regular maintenance to perform optimally, but when they are maintained they allow us more forgiveness.
This is different than even urethane balls where the oil sits, and sits, and sits on the cover absorbing very slowly, if at all. Have you noticed when Joe Bowler starts with his new urethane weapon of choice and carry in game one is substantially better than carry in game two and so on? They suddenly start leaving corner pins that were carrying early on...
What I suggest to those who like urethane is spray it down and clean it every game to help remove that oil left behind (even with a shammy). Currently USBC rules allow this until August of this year. There will be more discussion this summer so maybe they will come to their senses and retract that idiotic proposed rule change.
Anyway, long story short, I recommend regular surface maintenance in addition to cleaning the covers before putting them away in the bag. Best of luck moving forward.
