Step 6 · Clean Under the Rim and Jet Holes
To clean under the rim where water jets are located, dip a smaller, stiff-bristled detail brush into the vinegar or cleaner. Thoroughly scrub all around the underside of the rim. Use a small, handheld mirror to inspect the rim and ensure all stains and clogged jet holes are addressed. If you find jet holes blocked with mineral deposits, carefully use a piece of stiff wire (like a bent paperclip or a small Allen key) to poke into the holes and break up the blockage.