I use a stainless steel tea strainer/infuser every day at work. At the end of the day, I simply rinse it and wipe it dry with a paper towel. Then, every few months, I give it a good scrub with baking soda and white vinegar and hot water. This treatment shines it up nicely. However, over time, the very bottom of it (the bottom surface and the lower half-inch or so of the wall) has gotten build-up in the tiny holes that I just can't seem to clear out, no matter what. This evening I scrubbed it with baking soda paste, let it sit, then soaked it in a vinegar solution for more than an hour, then scrubbed it with a toothbrush and more baking soda—and it didn't make a dent in that build-up.
Any suggestions?
Any suggestions?