Once you have it mixed to a thick paste then use the old toothbrush to apply it to the caulk that is moldy(You will probably want to spot test in on a small area first to make sure it doesn’t damage the tile). Make sure it is on thick enough to fully coat the caulk. Set a timer for about 30 minutes and then just let it sit. It smells really strong so you may want to turn on a vent in the bathroom or open a window.
After 30 minutes check on the bleach mixture and make sure that it is still fully covering the caulk. Add some more bleach mixture to the caulk if needed. Then set a timer for about another 30 minutes.
Once the bleach mix has set over an hour then you can use the toothbrush to scrub the caulk for a minute or two. Then use warm water to wash away the bleach mixture. Make sure you get all of the bleach mixture off of the caulk and fully washed down the drain.
If you still see some mold on the caulk you can repeat the steps a second time to get rid of everything. You can see how just one time of using this bleach mixture made a huge difference on my shower.
With just these few easy steps on how to remove mold from caulk, you can get the caulk looking like new again. Want some other easy cleaning tips? Check out the easy no-scrub way to clean your shower doors. You can get your shower doors clean and shiny without a lot of elbow grease.