Okay, “And now you know why” — why *what*? Why you haven’t stopped by in a while? No, it doesn’t explain Baldo’s own actions to himself.
It could make sense as why he’s been banned from the shop; or more gently, why Sergio has discouraged him from visiting. But neither degree of that has been conveyed in the earlier part of the encounter.
So, *can* we fix this?
Comics I Don't Understand 
Here for reference is the Spanish version. It doesn’t seem to help any.
Sorry, but I don’t really see the problem. He creates havoc there whenever he drops by the shop. So no wonder it’s been a while.
It would have worked better if he’d said, “And now you remember why”.
He had forgotten whatever disaster took place the last time he visited; he only remembers that it was a long time ago. And another disaster occurs, and now he knows why it will be another long time before his next visit.
I am a little surprised that Pops doesn’t react more to his arrival; perhaps expecting that this time will be different.
Bupp and Sploosh sounds are never good.
As set up and worded, it doesn’t make logical sense. Pops should have been terrified and Baldo remembering why.
Lola, thanks for confirming my feeling that there is a logical gap in the cartoon as published. I’m perfectly happy to overlook that for the sake of the story / the humor, but I’m glad to hear I’m not just inventing it.