The best way to clean them is with "Blue Tac" soft glue stick. First get a regular wooden toothpick and remove as much visible wax as possible. Next get a small ball of Blue Tac and push that into the grill and pull swiftly and repeat until the grill holes look free of wax. Next get a Q-Tip, dab it in rubbing alcohol and clean the grill areas with that. Alcohol dissolves and softens the ear wax a bit more. Then repeat the Blue Tac method of pulling the remaining wax out of the grills to finish it off.
This is the best way I found to keep them clean. Depending on how dirty they are initially, there will be a significant increase in sound volume and quality afterwards.
View attachment 827454