hey,
-same here, eaven yestarday i was struggling with the same problem
Think the coke will be off the tires soon. The funny and strange thing is, that when the tire is totally wet, on my bike it works much better as when its just a little moist. (maybe because the dust and small gravel is washed off)
However, riding with slippery tires and low light is a good chance to improve balance and skills
Maybe throwing some packs of sugar on the floor would help?!