I think I made a mistake in applying the leather balm. I probably used too much of the emulsion, because the surface of the leather is now sticky. Is it safe to apply again?
According to your description, you probably applied the leather balm itself and not the foam. The good news is that by reapplying the leather balm correctly (described in another question below in more detail), you should also be able to remove the sticky layer that has now formed and clean the surface.