Our sink always has a tendency to spot up after long weekend of dish pile. I would like to lie and say this rarely happens, but with the number of gluten free experiments and baking escapades this house goes through in a given week, it is a regular occurrence in our house. It seems the only time the stains disappear is during one of our seasonal visits from the maid, but I have been determined to find an at home remedy I can do on my own to keep our kitchen gleaming year round. Apparently, this is a long standing question many others have found unique and helpful answers to.
To get rid of those ugly grease and soap-scum buildups in your porcelain enamel sink or tub, scrub it with a solution of 1 tablespoon ammonia in 1 gallon (3.7 liters) hot water. Rinse thoroughly when done.
Want to get your white porcelain sink as good as new? In a well-ventilated area on a work surface protected by heavy plastic, place several paper towels over the item (or across the bottom of the sink) and carefully saturate them with undiluted bleach. Let soak for 15 minutes to a half hour, then rinse and wipe dry with a clean towel. Note: Do not try this with antiques; you can diminish their value or cause damage. And never use bleach on colored porcelain, because
Get rid of those stubborn stains — even rust — in your stain-less steel or porcelain sink. Make a paste of 1 cup borax and 1/4 cup lemon juice. Put some of the paste on a cloth or sponge and rub it into the stain, then rinse with running warm water. The stain should wash away with the paste.
Put the shine back in your porcelain sinks and bathtubs by giving them a good scrubbing with full-strength white vinegar, followed by a rinse of clean cold water. To remove hard-water stains from your tub, pour in 3 cups white vinegar under running hot tap water. Let the tub fill up over the stains and allow it to soak for four hours. When the water drains out, you should be able to easily scrub off the stains.