I forgot this one: baking soda and plain white vinegar. Put the vinegar in a spray bottle. Sprinkle baking soda heavily on the worst stuck on crap and spray with vinegar. The vinegar reacts with the baking soda and bubbles. Let it soak for 20 minutes. Scrub with a plastic sponge. The vinegar loosens the food and the baking soda works like liquid sand paper.
Vinegar is absolutely awesome at getting hard water spots off the faucets, windows, chrome, etc. Wet a paper towel with vinegar and cover the area with it. Wait 30 - 60 minutes and poof! Water marks are gone. For heavier water spots, go back and spray again every hour. Even leave it overnight, covered with plastic wrap. The fumes from the vinegar penetrate the mineral deposits and dissolve them.
Vinegar is absolutely awesome at getting hard water spots off the faucets, windows, chrome, etc. Wet a paper towel with vinegar and cover the area with it. Wait 30 - 60 minutes and poof! Water marks are gone. For heavier water spots, go back and spray again every hour. Even leave it overnight, covered with plastic wrap. The fumes from the vinegar penetrate the mineral deposits and dissolve them.