HAYES Hayes Radar Brake Pads

Material: semi-metallic

You have to briefly apply brakes sharply on a flat portion and without any obstacles. 3 or 4 sets of 10 sharp and intermittent use of brakes are sufficient to wear in your brake pads. Sharp braking will wear out the brake pads a bit.
Release ten or so seconds between each braking set to let the brakes cool off before firmly applying brakes 10 more times

Braking in continuous mode or too light pressure can "glaze" you brake pad.Instead of slightly eroding the brake pad components, they melt.A thin layer of melted silica and metal can be found on the upper part of your brake pads, making them less effective.
In this case, don't throw the pads away, they are still usable. Apply brakes briefly and firmly to wear the glazed layers to make brake pads effective again