I would’ve thought at least that long, Tim, until I read this answer to a FAQ on Ohmland’s site…
A quick, and easy method to clean coils: dry fire and dunk in cool water while glowing several times until clean. If done regularly you shouldn’t need to do much more than this, but if your past that, a fine bristled toothbrush or similar and water should do the trick (this is a bit more risky with our high gauge builds so be very gentle).
If properly taken care of our coils will have an extremely long life. We’ve heard of customers using a single set of our high gauge staples for several YEARS and still going strong. Customers usually order when they want to try something new rather than because of a failure/worn out coils.
Time will tell, right. And, of course, holding your prized mod upside down over water to submerge the coils, might not be for everyone! LOL