I think you'd get better results with a change in shoe, too. I have two bikes with platforms, the mixte still has the plastic ones it came with 30 years ago, and the soma has new metal spiked ones. I find they're both about same; pretty good with runners and my nice boots, okay with my rubber sandals, and terrible with my converse-style flat sole shoes. Like, I almost felt was going to die and promised myself I was NEVER going to bike with such soles again. They did do a little better on my mixte - I think because those pedals have more surface area. But those shoes really did suck overall.