Senior,
Good to hear you're back in the game! And YES, crazy things have happened to bowling balls, pins, and lanes since you've been gone, not to mention the lane oils themselves. By the standards of the older equipment, even the "beginner level" balls of today far exceed the performance of the old rubber, urethane, and polyester balls.
As for maintaining the ball yourself, that's going to be a bit hard, unless you want to lay out some cash. You can do basic maintenance, but to keep the ball in its new condition, you almost HAVE to have a ball spinner machine.
If you choose not to lay out the $200 or more for a spinner, here is what I recommend. Buy a good microfiber towel ( which removes oil from the surface of the ball) and wipe the ball between each shot. Also, buy a GOOD cleaner, and clean your ball immediately after each bowling set. Keep an eye on the balls reaction and, when you notice it starting to get too strong ( like it did this time), take it into the shop and have it cleaned and re-polished. Every so often it will also need to be completly re-surfaced ( about every 50-100 games, depending on wear and tear ).
With good maintenance, your ball could last for a season or two before needing to be replaced.
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Good transactions list in my profile
"The difference between stupidity and genius is that genius has its limits."
Albert Einstein