Whiten old black showerstall caulking??

Wet and forget shower will clean over time. For quick brightening try hydrogen peroxide.

If the existing caulk is actually black (from paint) best to remove the caulk and replace with new caulk.

If black tile caulking was installed, you'll need to remove it and caulk with what color you choose.

If the shower looks like this in the caulk, here are 7 ways to remedy this:

https://www.sunrisespecialty.com/how-to-get-rid-of-mold-in-shower-caulk

Thanks everyone! I will try your suggestions today!

you can't clean the caulk once it has mildewed and turned black you need to remove the caulk and clean the area and dry thoroughly then replace the caulking

Is the caulking black from mold, has it been painted or was that the intentional shade?

Hi Mandy, just remove it and recaulk, if you are worried about your skill, just using masking tape to frame the areas you are caulking, run the caulking then remove the tape after you finish and before it sets. Hope this helps

Remove it. If the steam cleaner didn't remove it, it's probably mold. After removing it, clean the area well, dry and recaulk it.

Hello, Strip out the Caulking and replace with either new or use a ceramic tile for the purpose or use a vinyl strip to do the job.

I definitely suggest to just remove it then recaulk it.

Hello. These links could be helpful.

https://youtu.be/cq2H1dE7y_w

https://www.sunrisespecialty.com/how-to-get-rid-of-mold-in-shower-caulk

Best to remove it and recaulk.