Anyone have experience using this product? supposed to soften the tires to make them last longer. bought Hoosiers new. put only 6 heat cycles on them and then they sat for 5 months. Next session out they're like being on ice. Actually they finally got stickier on the 9th heat cycle. Plenty of tread left. Wondering if Pro blend is worth the effort. Found it on Jegs. 50 bucks a bottle but on sale for 10.00. that worries me. Any feedback appreciated.