Igniter on one burner wasn't working consistently

Fairly easy repair. Remove the grate, then remove the loose fitting burner assemblies. Unscrew 5 screws using Torx (star) screwdrivers - 3 along the ring top and 2 on the inside flat portion of the ring. You'll need 2 different size Torx screwdrivers. Once the screws are removed, lift that piece. It may be stuck from years of baked-on spills, but there's nothing else mechanically holding it. pull off the electrical lead, which is just held with a compression fitting. Use needle-nose pliers to pull off the C-clip holding the igniter in place. Careful not to lose the little spring that the C-clip holds in place, though it's not really under a lot of tension. Change out the igniter and reassemble everything. I used the pliers to push the clip back in place. All set - works like new.