IMO if you can not tell your wick needs changing, coil cleaning or replacing, without looking at it , then it is still ok.
I tend to rewick and clean every weekend because I like to have routines for some things. When I was mixing juice with higher vg and more flavour I used to have to do it twice a week. When I was coil cleaning and wick changing twice a week it was usually because I was noticing the reduction in vape quality now I do it to avoid the drop in quality that will come at some point in the next week.
Just looked at the coil In my rda and the wick looks not bad but the coil certainly looks gunky, it seems to be vaping ok to me so I will leave it till the weekend as usual.
