How to get rid of tiny spider webs in hair like object?

Mini Kossel
Filament: 1.75 mm PLA
Hotend: E3D V6, 0.4 mm nozzle
Slic3r 1.1.7 in Debian Wheezy Linux
Layer height: 0.3 mm

Simple object like below I can remove the spider webs easily.


Overall printing quality is good. But when printing hair-like object the Printer shows tiny spider webs.
It's kind of annoying.

I have no idea how to clean it.





Thanks in advance,
Hughe

Use a lighter, it burns away very quickly most of the thin stuff.