This is a common thing with black granite composite sinks.
Cleaning black granite sinks.
Franke granite sinks are extremely durable and non porous making them long lasting and very hygienic.
The baking soda and vinegar will work together to safely clean the granite while the mineral oil will come after and help renew your sink s luster.
Avoid harsh bleaches and cleaners such as chlorinated solvents or solutions that contain formic acid for cleaning your granite sink as these may permanently discolor the sink and ruin its good appearance.
I was happy to see i was doing that right i use both quite often on the sink and for a lot of other cleaning chores so i had them on hand.
Using a soapy nylon brush and scrubbing in circular motions will usually do the trick.
Anyway from what i read it seems that using either dawn dish washing liquid or a vinegar and baking soda paste to clean granite composite sinks is best.
Run cold water over the sink.
Use some baking soda to get rid of these.
Just remember to thoroughly wash away any extra soap left behind after cleaning.
Rinse area well before going to the final step.
Doing this regularly will prevent unsightly surface deposits or water spots caused by lime in water.
Use it to pat dry the surface properly.
Wait 1 minute wipe away and enjoy the luster.
Clean your granite composite sink daily with soapy water and a sponge or a soft nylon brush.
Now it s time to do something for stained areas and discoloration.
Granite can be very susceptible to harsh chemicals damaging the finish and weakening it over time but this mix of household cleaners is safe.
Give it another rub with a clean soft cloth the next morning and you are good to go.
The mild abrasive agent baking soda will be a pro element to get rid of such issues.
Simply sprinkle baking soda all over the spot.
Spread evenly with a soft cloth i do this before bed so it can absorb over night without any running water on it.
It should be complete waterless.
Using a dry microfiber towel or any soft towel or cloth dry the sink thoroughly.
Use vinegar and water in a mild solution to remove any mineral deposit that may have built up.
Rinse the sink then dry it thoroughly to prevent water spots soap and mineral deposits from clouding the finish.
Make sure the mild abrasive cleaner or homemade solution is completely out from your kitchen sink s surface.
Apply a tablespoon of mineral oil to a soft cloth and buff using a circular motion.
Once you are done with rinsing grab some paper towel or dry fabric.
Whether you have a natural granite sink or composite granite sink there are easy and effective ways to clean the fixtures.
I treat my black granite sink with mineral oil from the drugstore granite is a mineral so it is paired properly.