If I can't use Febreeze or anything with strong chemicals...

Thanks!  I just read some icky sounding reviews on Amazon, but it sounds like you've had no issues with it. 

"Will this work for musty basement odors?
Answer: Hello Colleen. from My experience this product does not work well on musty odors. I bought the 32 oz bottle to use on a chair I received from an elderly family member that had a musty moth ball odor. I used almost the entire bottle on just the seat cushion it had no effect. It also leaves a tacky residue on any hard surface. So tacky in fact my foot came of my house shoe while walking across it. That is just another con of the product I think you may be interested to know. It did not remove the odor and when spritzed in the air you must use some sort of solvent cleaner ( I used 70 percent Propyl Alcohol) to then remove the tacky residue left behind so it is pretty much a lose lose. I called customer service and they said they could not help me that they had had reports of it working on some moth ball and musty smells but not all like it is a hit or miss product and I lost all faith in the product itself."

Thanks!  Is the residue from the Dawn, do you think?

Thanks!  Are you able to share proportions, even roughly?

Thanks very much!  I'm going to write the recipe down for future use.