Cletus has greasy hair, yuck!
What would count as an impromtu wig? ?
Look at your inventory.
Use the mop, good old second hair!
Is there anything oily?
Some machines need greasing.
There is an oil tank next to the elevator. Go and dip the mop in the oil tank (remove the lid first).
Combine the greasy wig with the ugly cape and stiff collar to finish the costume.