I'm installing a decorative brick wall (individual thin bricks) for the first time. I glued all the bricks and now I'm working on the cement (mortar) around the bricks. I did a few rows yesterday for a test. While applying the mortar, some fell on the bricks. I wiped the bricks with a dry cloth as much as I could but the bricks are now covered with a thin "coating" that makes them pale and matte.
Q1: How can I clean the bricks?
Q2: How should I work the rest of the wall to avoid that?