Polaroid Polaview 305 - Manual (Page 90)

Periodic maintenance keeps your projector in top working
condition.
Cleaning the lens and mirror
To clean the projection lens and mirror:
1 Take a piece of lens tissue and form it into a loose swab.
Wet it with lens cleaning fluid or denatured alcohol, and
gently wipe it over the surface of the lens or mirror.
2 Take another clean piece of lens tissue and repeat the
process, wiping it over the lens or mirror in the opposite
direction.
Repeat this process until you can no longer detect smudges
or particles on the lens.
Do not look directly into the lens
when the lamp is on!
Caution: Do not use acetone to clean the lens; it may
remove paint from areas around the lens or mirror and
leave a residue on the glass.
5 Maintenance