burnt concentrate on puffco pro coil, any way to prevent/reduce?

hi all,

is there any way to reduce/prevent the build up on charred/black concentrate on the coil with this vape? i've had it approx 10 days, i love it but noticing build up already. im aware the coils are fairly expensive so if i can extend the life of one then id be interested in doing so, i feel the amount of build up in the amount of time ive used it must mean im doing something wrong

thanks