I think a big problem is that there are no controls on the use of that little three arrows in a triangle logo that is supposed to indicate recyclability. So there are many products that are not, in fact, recyclable that do have the logo on them. So how do I know that this plastic bottle is recyclable and this other one is not if they both have the logo? How do I know that only the lid of the pizza box can be recycled, but the bottom of the box has a plasticized sealant that can't be recycled when the logo is on the bottom and there are no instructions otherwise? And as someone else mentioned, just what the hell is the difference between cardboard and paperboard and which inks do and do not make either one impossible to recycle and how is anyone to know when they're on-the-spot at the recycling station and everything has the logo?
So what happens... that could very easily have been predicted if anyone with at least two brain cells to rub together had bothered to do so... is that many people just say "fuck it," look for the logo, and if its there it goes into the recycle bin. Now, you may point to the recycling habits in Japan to counter. But let's be real, Americans are stubborn arses about such things. It will be a multi-generational effort to instill that sort of attentiveness to sorting and recycling here. And no such effort is underway, not even in.California.
What is therefore needed is a new recycling logo... one that is trademarked and only licensed to be used on items that genuinely are recyclable; in fact and not some wishfully thinking fever dream. Granted, there will still be people who use the bins interchangeably. We'll never get the "caring about the environment is communism" people. But if we took this one small step to drastically lower the effort, we'd have the "fuck it" people properly and effectively recycling. And I would bet good money that there are more of the latter than the former.