Changes

It is important to keep the ferrules clean during fusing because dust between them can keep them ever so slightly apart, which is enough for liquid fiber material to leak between them and form a wing. Maybe if there were no dust on the ferrules they would meet perfectly and prevent wings.  

It is important to keep the ferrules clean during fusing because dust between them can keep them ever so slightly apart, which is enough for liquid fiber material to leak between them and form a wing. Maybe if there were no dust on the ferrules they would meet perfectly and prevent wings.  

A lint-free cloth does clean the fibers, but it can move some dirt down to the end where it should not be. It would be good if we could use compressed air to clean the fiber cladding and ends before fusing as well as using a lint-free cloth.

A lint-free cloth does clean the fibers, but it can move some dirt down to the end where it should not be. It would be good if we could use compressed air to clean the fiber cladding and ends before fusing as well as using a lint-free cloth. Even compressed air might mess with the cladding, though, so we should be careful with it.