Micro wax...
Hello Phil,
I use a good micro-crystalline wax to rejuvenate my EEE Ultra Shine when it becomes too viscous. I simply scoop the EEE out of the container and mix it up with a small scoop of Renaissance Wax or similar with an old potato masher. Then I replace it into the container and reseal the lid.
If necessary, I thin it a wee bit, using White Spirit, Stoddard Solvent or odorless Mineral Spirits, EEE-US contains (CAS 8052-41-3). Don't add too much though, or it will become runny and it will be difficult to apply. Less is more here, so add a wee bit a t a time until the viscosity is acceptable to you. Take care and all the best to you and yours!