It looks gross and the only thing that will work would be to take a toothbrush and a cleaning agent and scrub off.
How to clean wooden door handles.
If the hardware is very dirty mix in a mild dish detergent to loosen the grime.
Submerge the items in lukewarm water and let them soak for a minute or two.
My problem is how to clean the bottom of the glass doors not the door but the gutter under it.
Using water only wipe surfaces again to remove any detergent left behind.
Spray liberally on surfaces and wipe clean with a soft cleaning cloth.
Wipe the door handle thoroughly with the cloth.
However for stuck on gunk or stubborn residue you can create a mixture of equal parts of olive oil and vinegar.
Generally speaking all you need is a little all purpose cleaner and a microfiber cleaning cloth or bar mop towel to clean.
But i don t have a wood door to clean just a wide expanse of sliding glass doors from my apartment to my terrace which is huge.
Wipe the door handles to rinse the vinegar or lemon juice.
Dry the handles off with a clean rag or a kitchen towel leaving them sanitized and ready for use.
The easiest and safest way to clean your stainless steel door hardware is to use a soapy damp soft cloth and then rinse with clean water.
Rinse the cloth in clean water and wring it out.
Do not spray or immerse the hardware in liquid at any time.
Dip a rag in the water and use it to wipe down the handles.
Gently wipe the surface of your door hardware with the mild soap and water mixture.
Salt and enough flour to make a thick paste.
Dip a cleaning cloth in the mixture wipe a thin layer of the paste onto the hardware and let sit for 10 minutes.
You may need to rinse the cloth as you go to keep it clean enough to do the job especially if there is significant buildup of dust or dirt.
Open the wood door and use a clean damp cloth to wipe off the edges all around the door frame.
After you remove the hardware from the water move immediately to the next step without drying it.
Polish metal hardware that has dulled by mixing 1 2 cup vinegar 1 tsp.