Where are you seeing 30%?
I feel like I keep seeing this claim, month after month, but then I look it up and he's still got around the same ~38% approval. I keep getting my hopes up that people are finally realizing how awful he is, only to be disappointed again. It's depressing.
They're probably not looking on the first page of Google, for a start. We're at the sunset of the Information Age, that means that companies have bought all the info and are now manipulating it.