Are you troubled by strange noises in the middle of the night?
Do you experience feelings of dread in your basement or attic?
Have you or your family ever seen a spook, specter or ghost?
If the answer is “yes,” then don’t wait another minute. Pick up the phone and call the professionals... Ghostbusters

Well you could if I had an ECTO 1 to get to you

At 1:40 p.m., at Sky City, ten people witnessed a free-floating, full-torso, vaporous apparition! It blew glasses off shelves from twenty feet away and scared the socks off of some poor waitress!
This is a vial from that event

Buy this and help my ECTO 1 dream come true, I do non-profit appearances at events in auckland, also as a Dalek

Ectoplasm, also referred to as Ghost Slime and Ectoplasmic Residue, is a substance that comes from a ghosts and outworldly beings. It usually appears in a form of a slimy, greenish substance, but sometimes is visually completely absent, leaving only energetic traces

Tobin's sprit guide Summary:
Ectoplasmic Residue occurs when a spirit passes from the ethereal plane into our physical plane. The ectoplasm is the means by which the spirit can affect physical objects and force its will into physical reality. Fortunately this substance in its basic form isn't harmful, but merely stomach-turning and messy

Since the advent of our protonic equipment, ectoplasm is a double-edged sword for these wayward spirits. In the same manner that is provides them with a grasp on the physical plane, it also allows our Proton Throwers & Trap Streams to latch onto the spirit, leading to their untimely capture

Other types of slime, not to be released to the public due to safety

Psychomagnotheric Slime or Mood slime,is a form of ectoplasm whose polarity is relevant to the mood of the environment it is located in. It was first encountered during the Vigo the Carpathian incident by the New York branch

Black Slime is negatively hypercharged ectoplasm that is described by Dr Ray Stantz as being highly toxic to both body & soul