ECLIPSE lens cleaner is the highest purity lens cleaner available, containing less than 5 parts per million (ppm) of contamination (the whitish residue left after evaporation) It dries as quickly as it can be applied leaving absolutely no residue, making it the only recommended cleaner for CCD and CMOS sensor cleaning when used with Sensor Swabs. When used with PEC*PAD photo wipes, Eclipse is also safe and ideal for lens and filter cleaning. For lenses & other optics When used with PEC*PAD photo wipes, it is possible to clean only the portion of lens which is dirty eliminating "hazy swirls". Dispense several drops onto a clean, folded PEC*PAD and lightly wipe surface in a single direction. Refold pad to expose a clean side and re-wipe as necessary. Other lens tissues may not work as well, and some experimentation may be required. Each box contains a 59 ml. (2 fl. oz.) bottle with dropper applicator.