Yeah, the grout stain @charlie384 mentioned is a total lifesaver for this. I used a tiny artist's brush to get it right into the lines without smearing it all over the tile. Just make sure you really scrub the old grout first with a stiff brush and some cleaner, or the new color won't stick right. It's a pain but it does blend everything together.

That "wake-up call" about your pension fund is real. My credit union was quietly funding some awful stuff through their investments. It made me switch banks fast.

My old shop teacher swore by using a dental pick for vellum scraps.

Is BBQ really worth getting this upset over?

Yeah those black spots nina_butler mentioned sound like mold, not mildew. They're different. Mold is the fuzzy stuff that can actually ruin things, mildew is more like surface dust.