When you have a bit of dust or something on a negative, it really shows up in the print even if it's small. I've been blowing my negatives off after they are in the carrier with dust-off spray, but it doesn't always get the little stuff. Is it a good idea or acceptable to use a microfiber cloth to wipe them off? I have a print that I am happy with other than a conspicuous white dot in the sky. I know you can use little paintbrushes to spot prints, but does that work with glossy RC paper?