" car rubber protectant to the surrounds"
If you want to go that route, I`d recommend 303 protectant. Stay away from anything with sylicone . I get the impression that you leave the grills off your speakers. If so, the cones will collect more dust and the surrounds may discolor from the light. I leave the grills on, to protect the drivers, and to save myself from doing the extra work of cleaning.
To vacuum the drivers: use an adjustable suction (lightest setting) and hold at sharp angle to cone, not perpendicular, and brush lightly with natural hair brush. I only do this, if I had bought the speakers used and needed dusting.
If you want to go that route, I`d recommend 303 protectant. Stay away from anything with sylicone . I get the impression that you leave the grills off your speakers. If so, the cones will collect more dust and the surrounds may discolor from the light. I leave the grills on, to protect the drivers, and to save myself from doing the extra work of cleaning.
To vacuum the drivers: use an adjustable suction (lightest setting) and hold at sharp angle to cone, not perpendicular, and brush lightly with natural hair brush. I only do this, if I had bought the speakers used and needed dusting.