When you clean the combustion chamber of the stove (I do it every 3 to 5 pellet bags), don't forget to remove the "Flame Trap", the triangular steel plate at the top of the firebox, and vacuum above it, around the round air exchanger tubes, and around the full periphery of the square metal opening just below the tubes. This area needs to be vacuumed out at every regular cleaning, or it will restrict the exhaust airflow.
Every 3 to 5 bags of pellets, I clean my Ecoteck Elena as follows : takes about 10 minutes :
1) Remove Flame trap at top of firebox and vacumm around the heat exchanger tubes and the perimeter of the square opening just below the tubes. A "crevice" tool/nozzle on my ShopVac (with HEPA filter) works great. Move the scraper to the full out position to vaccum the rear edge of the square opening.
2) Use a soft 4 inch paint brush, gently brush off the Firex, use the vacuum nozzle to gather the dust. DO NOT scrape the Firex with the nozzle : it is fragile !
3) Replace the Flame-Trap
4) Vacuum the grate around the burnpot, then remove it.
5) Use a plastic spackle/putty knife and scrape the sides and bottom of the burn pot, then vacuum it, then remove it.
6) Vacuum the inside of burn-pot holder/receptacle.
7) Replace the burn pot
8) Replace the grate.
9) Pull out ashpan and vacuum it
10 Vacuum the bottom of the firebox, where the ashpan sits.
11) Replace the ashpan
12) Clean the glass with a wet (water) paper towel, dry it off with another (dry) paper towel. (NO WINDEX, and clean glass ONLY when it is cool to the touch)
Close it up !
I have never vacuumed my hopper : the Ecoteck auger does not seem to care about fines/dust.
About every ton of pellets, I vacuum out my flue.
At the end of the season (2 to 3 Tons) I take the side panels off, take the exhaust blower off, and open the two clean-out ports and vacuum everything out using a smaller diameter hose/tube, duct-taped into the hose nozzle of my ShopVac, to get into the clean-out ports and into the exhaust blower housing.
This cleaning routine works well for my Ecoteck, now on its second burn season, with about a total of 4 tons thru it. I have used medium quality pellets : Great American, PrestoLog/Lignetics (Lowes), Premium Pellet /Agri-recycle (Tractor Supply), and C&C Smith wood Pellets. I find my Ecoteck to be NOT fussy with the quality of pellets. They all burn about the same for me.
When you do the "big" seasonal cleaning, remove the 4 or 5 philips head screws around the exhaust blower motor to remove it, so you can clean the exhaust blower blades and the inside of the blower housing. It is easier to take those screws out than try to remove the allen-key screws at the outer edge of the blower housing (near the orange silicone gasket).