The scruffy faced Pacheco has been driving the Zamboni at BU hockey games for 16 years and looks like he should know a thing or two about a good shave. Besides the edge machine, the Zamboni is also used to cut down on the ice thickness and keep the rink level. It cuts the ice and washes it. In the Zamboni, there is a hot water tank, which pumps out of the hose and creates the new layer of ice, and there is a cold water tank, which washes the ice. The Zamboni spreads a layer of hot water on the ice with a towel.
Dirty water is returned to the tank after being vacuumed and filtered.
While Pacheco and Smith are stars in their own right, they don't want their product to shine. If the new layer of ice is shining, then they have applied too much water and the surface is too slippery, as Smith can attest. I should have been wearing my ice clips. Ice clips are what people would wear if the Earth looked like the ice level in Super Mario Brothers 2. They are metal teeth that strap on to the bottoms of shoes to combat the lack of traction and to provide some mobility for walking on the ice.