Cleaning glass teaware was discussed above. I confidently stated the dishwasher kept my glassware clean. Feeling poster's remorse, I went and, you know, checked. Putting my cups and teapots under a bright light revealed a cloudy coating
. The glass actually had a tint to it I had not noticed, and my new glass teapot was obviously not the same color as the older, identical one... I think this developed (or worsened) recently from the aged teas I have had more of.
What to do? I quickly thought of my friend, Mr. Percarbonate. For single wall items, I just soaked them in off-boiling water and added sodium percarbonate, same as I would do with a clay teapot. For double-wall cups, I just poured boiling water inside and added percarbonate (only the inside wall had the "coating"). I waited a while, rinsed, then ran everything through the dishwasher. Everything came out very clean, no scrubbing involved.