check the plastic cup in there to be sure it is in good shape and try adjusting the placement of the wire habitrail. There is some play if you loosen the two screws.....look from directly above the kickout hole and center the opening of the wireform with it. Good luck and let us know what works

Also check to make sure that the ball lock/VUK mechanism is firmly attached to the underside of the playfield. If that mechanism is loose, then it will absorb all of the energy used to kick the ball up instead of directing upward to get the ball up. If the screwholes are stripped then use toothpicks (or bamboo skewers) and woodglue to repair the screwhole. Drill a new pilot hole, then reattach.

Another check, there should be "2" screws holding the wireform, not 1. They tend to break at the welds.

Also make sure these holes have not become stripped out. I had a similar issue, where the wireform would get loose every few months from the ball hitting it. Screw holes were getting stripped, so some toothpicks and wood glue fixed the issue!

I had to replace the cup in the VUK. Mine only had one of the 4 prongs sticking up to keep it centered. It was a wonder I never had any problems.

Mine has the same thing (only 1 of 4 prongs) and I wonder whether it's this way on purpose? Very low plays on mine and I don't see how this would have been broken.

Take a small rubber ring, make a small cut, place on the rail on the VUK.

Just like this:

http://webpages.charter.net/chibler/Pinball/Images/WH2OBackSpinFix.jpg

Wow. Haven't seen that pic in a while. I was the one who did that a while back and posted it up for everyone. There are a few threads I have put up for things you should do to prevent damage to your WH2O including the one above. Another involves adjusting the ball guides on the ramps to have the last one come down more. Do a search and you should be able to find them.

If you put more than one, it works even better. I have two each on two of the sides opposite each other. It removes all backspin out of the ball.