0800744c_Never_open_your_DayStar_Filter__Problems_seen_
[Typical Symptoms] Once again, we don't use a grease. The only way for optical couplant to separate is to open the filter. DO not open the filter. Send it back. Most who think they have this problem actually have bad blockers and trimmers. [Repair Cost:] $150 - $750 [Problems seen:] 
"Optical 'grease' has separated"
F a i l e d B l o c k e r s & t r i m m e r s
F a i l e d h e a t e r
H e a t e r k n o b s e t t o o h i g h
F i l t e r i s d i r t y
" O p t i c a l ' g r e a s e ' h a s s e p a r a t e d "
S p i d e r v e i n s
E t a l o n d a m a g e
Never open your DayStar Filter
Problems seen: