Tips for gutter cleaning services?

they make a pressure washer attachment that bends like a U for c ln eaning gutters from ground you'll also need some extension.
not sure where your at but 25 sounds good considering the job.

A tall ladder and rubber gloves are all I use.
sometimes a hose to rinse later but not always.

A fragrant rose and yummy halwa smelling them is what I do. Who am I?

If you're really asking a question like "Is there a tool of some sort" then you should be paying people to hire you. Jesus!....