You're either at the mercy of the installing company to come and remove the covers, clean the gutters, and reinstall, or you have to go up a ladder and clean them yourself.
The problem with the single fin type of gutter guard design is that it allows all sizes of debris to flow into the gutter. Whatever can stick to the surface of the gutter guard can flow into the gutter. This design is available both as a cover to cover existing gutters or as a complete all-in-one system to replace regular gutters.
You can maintain your home gutter using the best gutter guard protection.
Image Source: Google
The question is how can this design be improved? If you Google "care-free solid top gutter guards" you'll find the next improvement. The next generation either has one row of openings (with louvers in each opening guiding water into the gutter) like shown on the care-free gutter or it has a trough with sieve openings to limit the size of the debris.
While this type of gutter guard is an improvement, it will not successfully keep out debris under heavy debris conditions. Debris that comes down the face of the gutter can still wash into the gutter from the gutter lip.
While it's less debris and smaller than in the previous design, in heavy debris conditions, someone has to go up a ladder to remove the gutter covers and clean the gutter. The gutter cover with a trough is nailed into the roofing which adds a complication to maintenance.
Is there a maintenance-free leaf guard? What would the best gutter covers look like? How can the single row louvered gutter guard system or the trough gutter cover system be improved? Google "waterloo gutter guards" and take a look at that design.
Notice it has two rows of openings. In each opening is a louver that guides water into the gutter. Of all designs, it is the best leaf guard recommended by Consumer Reports for two reasons.
1. Nothing larger than 3/4" can ever get through this gutter guard.
2. Nothing can be washed in from the lip of the gutter.