Yes, it appears they have changed the formula.
I had a can that used quite often. i must have had it at least 8 years, and it seemed like it would last forever. When it finally did run out, I got another one. This was within the last year. And, now the darn thing is empty. Then I fell upon this thread. I checked the can, and sure enough the ingredients are Isopropyl Alcohol (67-63-0) and hydrocarbon propellant (68476-86-8) as printed right on the can.
So, yeah, $40 for spray alcohol. I wonder why it ran out so fast... i certainly know how to use it. Anyway, not buying it again. What a rip!
how clean is your house