There's a good vid on YouTube and here on ECF somewhere on how to clean them.
Basically I .......
Remove the tip and the small rubbery washer as if your going to refil the clearo.
Attach the empty clearo to a battery (use a syringe to empty it if needed).
Carefully wiggle the tube off the battery connection end by a few millimeters.
Insert a pencil or something similar into the top of the tube to hold the contents of the tube in place and slide the tube up and onto the pencil.
Remove the rubbery cap from around the coil with the filling holes in.
Rinse the contents of the tube under running warm water, being careful to keep the battery dry (you might want to unscrew it from the battery for this)
Pinch the wicks with paper towels to dry.
Dry burn the coil a few times (I find it helps to burn off any clinker on the coil if you blow on it while dry burning)
Allow to cool for a few mins.
Rince, dry and dry burn again.
Place the rubbery filling cap back around the coil, making sure the notches are lined up with the wicks.
Slide the tube back on, fill the clearo, insert the rubbery washer and tip.
vape!
There a few
threads on tips n tricks for clearos. For better performance i either lift the rubbery filling cap a couple of mm or cut larger notches in them to allow more room for the wick.