I think I remember all of these...
Grover the Weather Salesman. I think that was the first one. He brings a weather machine into Kermit's house and demonstrates snow, wind, and rain in his living room. Kermit doesn't want to buy any of these, so Grover leaves, but he doesn't turn off the rain; he sells Kermit an umbrella instead.
Grover as a toothbrush salesman
Grover as an earmuffs salesman (Kermit ends up with two ears)
Grover as a nosewarmer salesman (Kermit ends up with a nose)
Grover as a glasses salesman (Kermit ends up with a nose AND ears)
Grover the wig salesman. He gives Kermit one for free, and then tries to sell him a comb.
Plumber Grover. After deciding which size of pliers he will use, he floods Kermit's house. The scene ends with Kermit and Grover trying to drink the water up with a straw.
Monster Repair Team. The faucet is leaking and Kermit calls the plumber. Grover the Plumber appears with his Monster Repair Team (Herry as a phone repair man and an unnamed female monster as an electrician). Grover repairs the faucet, but had to remove some of the telephone wires. Herry repairs the telephone, but had to remove some fuses and causes a blackout. The female monster repairs the electricity - but of course she had to remove one of the water pipes...