What is Evil Jester's ONE weakness?

Nothing can kill him. If you decapitate him, burn him, freeze him, poison him, suffocate him, electrocute him, beat him to death, shoot him, stab him, choke him, or even disembowel him, he just won't die because he is a supernatural demon and will forever come back to strike back until you are completely DEAD. However, the ONE weakness Evil Jester only has is if he kills HIMSELF in any possible way.