Brass cleats are soft and wear out quickly. Replace yours with these 3D-printed Silca Titanium Cleats for Shimano SPD pedals and get 4 times the use for half the weight.
Features
Compared to traditional brass cleats, these 3D-printed titanium cleats weigh half as much (approx. 30 g less than stock Shimano SPD cleats) and last 4 times as long
Yet they won't wear out the pedal interface as 6/4 titanium is slightly softer than the tool or spring steel used in pedals