I agree with Matt ........100%

When you are done scraping , fill the entire take with another round of bleach and water. ( not too much bleach) couple caps full.
Dump out the water
Rinse thoroughly !
Fill one more time with clean cold water (all the way to the rim) and lots of de-chlorinator......... let it sit....sit.....sit, so that all the bleach is cleared from around the silicone.

Easy !

Have fun!