Check these following steps out.
Getting rid of mold in bathroom ceiling.
Dip a clean rag into the solution and wring it out lightly.
If you find them dirty scrub with the brush and clean up with water.
Spray the cleaning solution on the visible mold on the ceiling.
Fill a bucket with 1 gallon of hot water 1 2 cup of bleach and 1 3 cup of laundry soap.
Go over the space two or three times to ensure you get all of the mold.
The bleach will effectively get rid of the mold but it could also accidentally damage nearby materials.
Work in small sections from the edges of the mold to the source.
Combine the ingredients and mix with a disposable stick being careful not to let any of the liquid spatter outside of the bucket.
There are a couple of ways to prevent the black mold growth on your bathroom ceiling.
Spray the bathroom ceiling and wall regularly with the combination of water and hydrogen peroxide.
Use a uv lamp and direct it at the ceiling for 24 hours.
Rinse and wring out the rag in the bleach mixture frequently while cleaning the ceiling with the bleach.
Wipe down the molded areas of the ceiling with the bleach solution.
For a more natural way to get rid of mold in the bathroom you can use distilled vinegar.
Mix a solution of 1 part chlorine bleach to 2 parts warm water into a clean bucket.