I can only urgently warn against use with sensitive precision instruments and optics, because the sucked unfiltered air finally comes indeed from the direct work environment, enriched with all kinds of dusts and fumes (perhaps animal or smoking household). The ingredients of the bellows come still added - which is of course not a "rubber" (latex), but PVC with a high content of various plasticizers, the goodbye over time - the bellows is then brittle and fragile. Phased sticky fine particles are then found to blown objects again.
At a brush you have omitted. Consisting usually of inferior yes bristles also harden with age and can cause scratches and smudging the blown particles in addition to the lens. This "improvement" of the bellows can but do not lead to a better assessment.
In most of these products from the Far East is the way expressly indicated that they are suitable for cleaning sensors * not *: will say so on the packaging or package insert, during the Amazon seller advertises funny to the contrary. In case of damage is one law but only if the written instructions have been adhered to the product, the seller could sue only for unfair competition.
Who would have "messed up" his look with this or a similar product, I recommend for cleaning glass surfaces with a mixture of 2 parts of distilled (!) Water with one part isopropyl alcohol (there are at the pharmacy). Apply with a cotton swab and gently wipe from the center to the edge, not a circular motion. Chopsticks change frequently. Unlike most expensive offered detergents so no residues remain on the lenses.
One with this brat "treated" sensor is however not beyond redemption because only helps the customer service.
Such bellows are banned as soon as possible in the garage, or even better in the bin.
