I have some small solenoids that activate (push) at 12V and I'm guessing about 1/3 an amp. I'm using an elastic band to retract them again when they're not energized. They work great if they're only energized for about 1 second or so, but any longer than that and they tend to stay activated (magnetized in pushed position) for about one or two seconds after the power is disconnected. That's unacceptable for my application, and I was wondering what a fix for this might be. If I reversed the polarity on the solenoid for a couple milliseconds, will that de-magnetize it and allow it to retract quickly? Thanks.