I've stuck to the isopropyl and salt method also for a long time, but sometimes it can be tedious to do if you have many pieces. I was looking for a safe liquid to use more for a soaking method. I've tried the 420 cleaner, and although it does it's job, I also suspect it to be nothing more than some cleaning solvent and salt. The main problem I have with 420 cleaner is that it leaves a smell which you can taste when smoking after using the cleaner. (even if you rinse it out many times)
So I was wondering if Grunge off also leaves any type of smell behind? From the pics and descriptions it seems like it works better than anything i've tried so far. (and i've tried a lot) I just really don't like the taste of 420 after cleaning, and isopropyl does the job well, it just requires time and cleanup.