I have this attachment on a garden hose which is preventing removal from the spigot. It appears to be push-button, but I can't get it to work. I had discovered a contractor had previously succeeded in unattatching it while working, only to find a subsequent contractor reattached it, so it's not broken, but I'm back to square one.
I did a web search, but couldn't find the item starting with an image search to lead to a how-to. Help.