Originally posted by
No, never, unless you want to spend some money on new toys to replace the ones you just destroyed...
I've used silicone lube on silicone toys. As long as you spot test, if you're not sure, you're fine. It's not like the toy will explode or melt into goo at the first dollop of lube.
The big issue, as been stated around the site, is when you use a silicone lube with a toy that's not 100% silicone (e.g. TPR Silicone). That can cause the problems.