Something I do when I am having problems sticking could be just as simple as taking your hand and making sure there's nothing on the bottom of your shoe. After you determine that your sole is fine, I learned this little trick. When the employees sweep the approaches, they push the dust under the ball returns. Sliding your foot under there a few times and then sliding it on the lane should give you a little bit more slide. I have also learned to adapt to kind of "driving" my foot into the approach, expecting not to slide, and it takes some getting used to, but can help you out with the approaches.
Just my two cents.
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-Ricky-
Member of the St. Louis, Missouri YABA
MORE Speed = LESS time to PANIC
Currently Throwing: Brunswick Inferno, MoRich WMB, MoRich Labyrinth, Ebonite Eyeball, Brunswick Impact Zone, and Columbia 300 Piranha.