How often to change the coil in a sub-Ohm tank?

[McDragon71]

I'm new to the Vaping world and really launched (6 Mo) myself into it. I was unhappy with 510 cartridges because the plug up at half empty. SO I switched to Sub-Ohm tanks and commercial Sub-Ohm sauce from Cannavape. I've seen a bit on tanks and coils having to be replaced. How often should the Coils need replacing? BTW I use a Freemax 30w and a Freemax2 Sub-Ohm pens.
Still learning, not an easy thing to do @74 but doing it nonetheless.
A quick intro to me. As I stated I'm 74 Yo and started this Journey a long time ago in a far away land. I was 17 when I went into the Army. Spent two tours overseas, One in Korea, the other in Vietnam. I was 19 when I when I got to VN, and It wasn't long after getting there, I got high for the very first time. not to be the last while in country. I found out that booze and pot are bad bedfellows. It was either/or but not both. I was a drunk until 1989, when I went cold turkey. To this moment I still don't drink. I quit smoking Tobacco in 1995 after my Dad passed from Cancer.
I started smoking THC/CBD for the benefits for my health. I WAS grossly OW, and the CBD/THC has contributed to my weight loss of over 70#. I have a few other ailments that the Vaping has contributed to the releafe of.
Nuff for now. Looking for an answer to the question though.

 

[AlphaDeltaF1]

Hey McDragon71,

Welcome to FC !! Very cool set up you have.

When I was using subohm coils for ecigs, I changed mine every 10 days or so. However, it really is based on the volume of material you use daily. I recommend taking the coil out and Inspecting it after about 5 days of use to see what it looks like. If you see the coil is gunked with carbon / taste bad go ahead and change it. A coil change is cheap assurance your flavor will be on point too.