General usage notes: (i) always select the least aggressive pad you think you will need to achieve the desired result, and step up one grade at a time if more cut is required (ii) always ensure that you centre each pad properly on the backing plate (this can take several attempts to get right, but is vital if the machine is to remain perfectly balanced during use); (iii) always use an appropriate sized pad for the backing plate you are using (the pad should always protrude past the edge of the backing plate, never the other way around); (iv) always prime a new pad by loading it with 2-6 pea-sized drops of product (depending on pad size) and running it stationary on the paint for 30 seconds at low speed; (v) always ensure that spent polish residue on the face of the pad is brushed off regularly during use using a PB Utility Brush (failure to follow this advice can lead to micromarring of the finish, so don't be lazy!); (vi) after use, soak each pad in a bucket of PB Snappy Clean Boost solution for 15 minutes and then rinse under fresh running water (using your fingertips to massage out any remaining polish residue) and allow to dry naturally, and; (vii) while not in use, store in a dry, dust-free environment (lidded plastic storage boxes are ideal in this respect).