No set schedule has to be followed to clean a bike lock, but it is important to make sure it doesn’t get too dirty. For traditional bike locks that operate with a key only, some companies have included built-in dust cover to keep the keyhole from getting debris trapped in it. The smallest amount of dirt in a keyhole can make the entire experience annoying since the keys are precise in their shape.
Dirt collecting in the hole can throw this precision off, resulting in multiple attempts to get your lock off. And in worse scenarios, the dirt will be lodged in so deep that your key won’t work. It takes a lot for this to happen, so unless you’re accumulating a record amount of dirt while riding, it shouldn’t be an issue. Just be aware that wiping your bike lockdown every now and then will only benefit the long-term life of the product.