What causes tool marks on glass?

Tool marks on glass are caused by just that, a tool used to shape the glass when molten and malleable.  These can be removed with extreme heat, allowing the tool marks to melt away.

What do i do if my heating element is sitting too low on my ssv?

If your heater is sitting too low, you may not get a good hit.

  1.  turn off the unit
  2. make sure it is cool
  3. remove the heater cover
  4. pull up on the heater, making sure not to pull too hard
  5. make sure the heater is aligned center as to not touch the glass heater cover
  6. add the heater cover, again making sure the heater is not touching the glass, but it should be about 1/4 -1/8 inch from the top of the heater cover.

what do glassblowers use to sign their work?

Glassblowers can use a titanium rod that is filed to a point with a little water or spit.  Not sure why this works, but it does!

They can also put on a platinum decal like some of the Elev8 Premier team does.