How long does it take to clean the quartz sleeve with the citric acid solution?

Light scaling: Soak for 15–20 minutes.

Moderate scaling: Soak for 20–30 minutes.

Heavy limescale: Soak for 30–40 minutes.

If stubborn stains remain, gently wipe with a soft sponge and extend soaking time properly. Do not soak excessively long to avoid damaging the quartz sleeve.