I have yet to soak my IO MP in ISO to clean!
NOTE: I only use the performance MP, as it does NOT have any hidden internal parts to get gunked up, and I find the standard MP the pen tip style, gets hotter faster on my titanium IO, and the performance tip immediately fits my 14mm female glass rigs. I also dislike the stock tips, narrow SET airflow restriction. I can have more restriction control by using various glass 510 TIPS from my ECig collection, many will fit the performance tip by swapping orings. These tips have various internal diameters I can choose from, thus restriction control by the user.
The performance tip is as simple as it gets, just the internal screen. Every few bowls, I use a 99% ISO Qtip, to clean both sides of the screen, as well as the internal threads on the MP. I do a similar thing with the load chamber, being careful NOT to SOAK the qtip, and keep the GH load side down, so no ISO can get into the heater section. Then a DRY qtip, and often let the IO run it’s 15 second timed turn off, so I’m sure the inside is bone dry. Also wipe the body’s external threads that connect inside the MP tip section.
The ONLY thing that is not accessible to clean is the heater section located below the load screen. I don’t want to remove that screen just yet. Someone in this thread posted a picture of how bad it can look under that screen as residual vapor holds and distributes RESIN over time, coating everything you don’t have easy access to. I do however ONLY use flower that is MEDIUM GRIND, using my LG BCG grinder, so there is a bit less smaller particles and weed dust that can fall through the relatively large load screen getting trapped in the body.
None of this is that time consuming, nor do I mind, as keeping my IO as clean as I can, will hopefully keep it in my hands, and not in a long repair queue.