Raise your temp up a bit and it looks like your substrate is too wet. Water that pools will become stagnant and bacteria will begin to make the frog sick and potentially cause wounds such as this. Though usually on the frogs stomach and thighs not the face like this.

You say you also feed him crickets. Do not leave them in with the frog for an extended period of time unsupervised. They will bite and attempt to eat the frog.

Any sharp surfaces on the mentioned furnature? Has the frog been shedding normally?

For now address the above issues and you can put a triple antibiotic ointment like Original Neosporine or Polysporine on the wounds daily.

Any additional information about your clean up crew, spot cleaning, ect could help.