Cleaning and Stain Removal - Help cleaning Silicone pans

I was wondering if anyone had figured out a good method for cleaning Silicone cookware, specifically bread pans. I had no problem with them at first but over time they developed a tacky/greasy feel on the outside and I can't seem to get the out smell of the last batch of bread I made in them. I've tried scrubbing them with baking soda and letting them soak in an amonia/soap mixture. This got most of the stuff off the outside but the smell still remains. I also tried washing them in a dishwasher which didn't seem to do much.

Thanks in advance

Never dealt with this persay...but have heard that the protective liners on some brands of cookware start to wear down after some time..making them harder to clean. Thus the owner scrubs harder each time....breaking down the layer more. Until they become impossible to clean. Im not saying in your situation its hopeless, but just sharing some insight. I would soak in a quality degreaser for 10-15 mins and then rinse.