Silicone residue removal

[gregzz4]

I wouldn't use WD40 - too much stuff in it

99% Isopropanol (isopropyl alcohol) works well on the leftover film
Drug store stuff

[hillegom]

I used the replaceable blades for an olga knife. Very sharp! Just cuts the silicone off. 2-3 blades is all you will need. Then I used alcohol to clean the glass before putting on new silicone.