Ajax or Soft Scrub. Scrub with light pressure from your finger. Rinse it our thoroughly and then let it soak for an hour in fresh water.
Let it air dry fully then wait half a day and I'll guarantee there will be no bleach inside to hurt your eyes.
OR Colgate toothpaste. Lots of elbow grease from your finger or a toothbrush.
The problem with most toothpaste is they're not all that abrasive anymore because they often are a mixture of gel and actual abrasives (microbeads or minerals). You want good old fashion mineral abrasives IMO.
To test out if you're mask is clean, do a quick breath test. Make sure your lens isn't heated if you used hot rinse water (ie. rinse in cold water or if it's room temp you're set).
Breath on it for a quick second and see if the fog you've just created on your mask starts to fade readily. If it seems to stick for a long time you'll notice.
Most often you'll notice your edges stay fogged much longer than the center. Just means you didn't scrub your corners properly
If you're still fogging then you're probably a nose breather, and your new mask doesn't fit like your old mask which can cause problems.
Let it air dry fully then wait half a day and I'll guarantee there will be no bleach inside to hurt your eyes.
OR Colgate toothpaste. Lots of elbow grease from your finger or a toothbrush.
The problem with most toothpaste is they're not all that abrasive anymore because they often are a mixture of gel and actual abrasives (microbeads or minerals). You want good old fashion mineral abrasives IMO.
To test out if you're mask is clean, do a quick breath test. Make sure your lens isn't heated if you used hot rinse water (ie. rinse in cold water or if it's room temp you're set).
Breath on it for a quick second and see if the fog you've just created on your mask starts to fade readily. If it seems to stick for a long time you'll notice.
Most often you'll notice your edges stay fogged much longer than the center. Just means you didn't scrub your corners properly
If you're still fogging then you're probably a nose breather, and your new mask doesn't fit like your old mask which can cause problems.
The more abrasive the cleaner, the softer you scrub... The less abrasive the clearer, The harder and longer you scrub... 20 yrs ago toothpaste worked great because it was more abrasive and the lubes they used when making glass left less residue... The coating left today on the glass is really stuck to the glass and does not come off as easy... Hope this is helpful to you... 
