I'm jumping in the induction bandwagon. Seeing mixed messages whether to use a silicone protector to keep it clean and resist scratches. Those of you with experience, do you use a protector or no? If you have one, can you see through it enough to tell where the burners are? I'm confused! In any case, I'm planning to at least get one for when I use cast iron pans, which is probably only one day a week. Is it worth getting a large one to cover the entire top? Thanks!