Q. Does one have to tovel (immerse in a mikva) the metal racks inside a stove oven? With a brocho?
A. Horav Shlomo Miller's Shlit'a opinion is that, even if occasionally someone places food directly on the oven racks, (such as when placing chalos to warm them), although there is no need to tovel the racks, and so is the minhag haolam and common tradition, if one desires to be machmir, he should immerse them without a brocho.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit'a