I'm trying to remove a bathtub diverter spigot, but I can't tell whether it is a screw-on or a slip-on (with a hex bolt at the bottom). My spigot has the notch where a hex bolt would normally be, but when I look inside the notch, I can't see anything but a metal plate, a plastic tab, and some white silicone. Does this mean that I have a screw-on or do I have to remove something to get to the hex bolt inside the notch? I can turn the spigot some with my hand, but I think the silicone is resisting the torque. I don't want to just start wrenching away without some better information.
Any idea on how to remove this type of spigot? Thanks!