Something that old, your best to start over
Dawn is only for cutting the buildup and cleaning the globe/cylinder
The process is as such
Start boiling 2 pans of water
Empty fluid and discard
Heat goo (with lamp is ok)
Remove goo and save
Keep in mason jars on stove in water bath that is now on simmer form boil, so it stays liquid during the following process
Add dawn and boiling water (wear waterproof gloves)
Thoroughly clean globe with bottle brush
Run tap sop water gets hot while doing this
Dump boiling water and residual goo
Add a touch more dawn, fill with hot tap water'
Rinse repeatedly with hot tap water until there are NO soap bubbles left.
Add Surf and 2 cups distilled water
Shake, and roll fluid around globe until all glass is coated well
Add more distilled water until @ 1/3 full
Slowly add heated goo with funnel and down tube attached to funnel so it is submersed just under water level.
Lava will cool immediately upon hitting the water.
Doing it this way will ensure it will not stick to the globe/tube.
Add remaining distilled water
Cover loosely and put into water bath and heat until all goo is floating for a while
This is to get out any bubbles created by filling the lave into the globe/tube
Let cool-BE PATIENT
Remove some fluid (@ 1 cup in your case)
heat on lamp base until hot (125F) and add propylene glycol until density/specific gravity is changed enough for floatation
If you want to see pictures of the process, go to http://oozinggoo.ning.com/forum/topics/go-big-or-go-home-lol