More traction for sparki

I find that sparki tends to slip on the line following sheet that comes with sparki. Any tips on increasing the traction? Thanks

Try putting something in the grippers to weight it down. I did this so that Sparki could climb an incline…used a tennis ball or small battery…may or may not work.

Thanks,but it happens with or without something in the gripper. I will try something heavier, but my surface is flat, no inclines.

Found the problem! It wasn’t a lack of traction, it was a lack of torque. When I replaced the NimH batteries with alkalines, all the problems disappeared. Too bad we can’t fit spark to take 5 NimH’s