In "Low-Cal Munster", for some reason, they made Herman's hands very hairy. It was just for this episode and it gave the writers the chance to give Dr. Dudley his "doggie" joke.
Mid-way through the episode, the fur on Herman's hands is gone and no explanation is given.

Don't forget "Rock-a-Bye Munster", he has the hairy hands in that episode too! Again for Dr Dudley to make a joke about him having his doggie with him!
That episode is hillarious!

"He was about ten feet tall, green and had a penguin with him that turned out to be his grandfather". Hee..hee...

"Get back in bed dear ... your sick"
"That's you"
"Ohhh, I wondered why you were wearing my pyjamas".
Hee....hee... I love that episode!

If you think about it there are alot of inconsistances throughout the first series of the Munsters regarding the make-up, it only really settles down in the second series!
Mind you, so did alot of sitcoms in the sixties, they didn't seem to bother as much, for example Car 54 kept swapping characters in the show and one episode they said one thing then another in another episode.
People probably didn't notice like we do now because we rewatch and analyze the programs because we are fans, but in the sixties people just watched them on tv on a Thursday night for example!

- Dracula.