A folded piece of very fine sandpaper (600-1000 grit) from an auto parts store (used for body repair finishing) can be dragged through the points while closed against the stock rails. But the problem will return eventually.
For permanent no-hassle operating many railroaders link a small single pole double throw microswitch mechanically to the throwbar to duplicate the electrical switching action of the points in a reliable manner. These can also be added to some switch motors. The trick is to adjust them so they switch at the same time that the points are in mid travel so they don't 'fight against' the points electrically and cause short circuits.
See this thread on this forum for more info:
Peco Electrofrog turnouts - HO vs N contact
08-28-2003 10:57 AM
http://www.the-gauge.com/forums/showthread.php?s=&threadid=6562
Photos below show one way to make a linkage using 5/64" brass rod through a 3/32" styrene tube bushing (evergreen scale models #423). The rod fits snugly enough in the bushing to rotate without wiggling sideways, use a little loco gear grease for long term smooth action. The hole for the styrene tubing is round 7/64" diameter (3/32" is too snug on the styrene and pinches the brass from turning easily).
The throwbar hole should be 'ovaled' slightly as the rod swings in a slight arc and you don't want to push the throwbar sideways because of rod tension (parallel to the rails).
The microswitches are 2 amp low force (25 grams) from Digikey. Only one is needed to power the frog, but 3 can be used for other functions such as reverse power routing.
The beauty of this method is that it can be added AFTER the turnout and ballast is installed (ie, i goofed) since the hole is round and to the side rather than a slot directly under the turnout. Or a micrswitch can be hidden inside a structure and linked to the top of the table - many ways.
The problems are if any dirt or glue gets into the styrene bushing it binds the rod. Also over time the Peco turnout springs loose some of their tension and have a hard time holding against the multi- microswitch pressure even at 25 grams each. Next i want to try small ceramic magnets glued to the rod to help latch the points in either position. Or use fast relays.