Easy to clean unscrew the coil section remove the little rubber nipple, now wash under a tap until the wicks are white again. Let it dry out you can then pulse it and blow on it till the coils are glowing you will still have some colouring around the coil area but its nothing that will affect the flavour.
I dry mine out on a radiator over night then do a dry burn.
Put it all back together and your good to go.
Out of interest how many spares do you have ?