Three tools do most of the work of keeping a pellet stove running well. None of them are expensive, and all three are things I use every season rather than things I was sent.
The three links below are Amazon affiliate links. If you buy through one, this site earns a small commission at no extra cost to you. It does not change what gets recommended — these are the tools already in my own cupboard.
About $10
Great for getting in behind the stove and into the hard-to-reach parts. Real boar hair, and only ten bucks.
About $80
A good little vacuum I have had for years. I use this through the season; when the stove has been cold for a few days I switch to a shop vac with a fine dust catcher.
About $35
Designed to run off a cordless drill. Keeps the vent clear, which means safer and more efficient heating and a longer life for the stove and pipe.
The weekly round takes about fifteen minutes and is the cheapest upgrade a pellet stove will ever get.