which is the superior method ? (or all
they all alike for the most part).

(a). rotating brush / snake

(b). compressed air blow in one end,
blow lint out other end.

(c). "viper" compressed jet snake
device.

the current vent appears fine (no
drying related complaints), and this
is preventive maintenance only - but
there's no telling when (or if) the
prior homeowner ever cleaned it (home
is about 10 yrs old).

the low ball price i got was for a
compressed air flush of the vent (about
$89)....other services quoted me about
$200 using a brush/snake.

any opinions on one method over the other?