Remove the pod, pull out the old AF coil from the base of the pod, and press a new 0.6 Ω or 1.0 Ω coil into place. After filling, allow the coil to soak for a few minutes before vaping.
This is only relevant with replaceable coil version of the pods. The non-replaceable pods have fixed coils. Once the coil is burnt out, simply replace the full pod.