Be sure to check your drains.
I'm washing out my pots, using bleach and water 1/10 just like you have taught us too. You will not believe what I discovered. Most of my pots have the attached saucer on the bottomm so I removed them only to discover the only holes on the bottom of the pots that were punched open are the ones that attach to the saucer leaving nothing available for drainage. This would even mess up Tapla's mix. Those guys are setting us up to fail. One more reason not to use saucers and if you do buy a plant in a pot with a saucer, check to make sure the drainage hole is open.