Hi Connie!
You know what? We're pretty lax around here when it comes to gadgets. As long as it's a household "tool" of sorts, we'll talk about it. I totally consider a vacuum a gadget. And if you'll bear with me on my backstory, I'll get to my advice.
I have the Dyson DC14 All Floors (the one below is the Animal, a much newer model, but basically looks the same.)
Vacuums are a big focus in our house because I have allergies and pushing heavy vacuums is difficult. We have mostly hardwood these days, but used to have all carpet, and no pets.
So, DH and I have been together 15 years and he's forever been on the search for a vacuum that doesn't just blow the dust back out into the air and that I can push comfortably enough to do the whole house when I need to. (He usually does the vacuuming, but I'll run it when I want to do detail work or before company comes and he's at work.)
In that 15 years we've owned 8 vacuums, of all brands, including the Roomba. I grew up with a central vac system, but that's something my parents built the house with, so I haven't had it in my adult life. All the regular vacuums made my allergies worse, broke (without pets!), or were simply too heavy for me to push around (even self-propelled ones).
Around 2005 I think, we bought the Dyson and I have no intention of getting rid of it. Hands down the best all-around vacuum we've ever used.
Keeping it clean inside and de-clogged though, is a big factor in it's performance. Depending on the model you have the cleaning might be a little different, but should be fairly simple.
I try to empty the clear bin about every other time I use it, with DH using it a couple or more times in between my uses.
The washable liftetime filter needs to be cleaned out as well, and I'll do that about every other time I empty the clear bin. Both are really easy to do.
Even without pets I have a hair issue because I am a hairdresser and cut my family's hair in the living room, and DD's hair is super long (like, past her bum), so when it falls out it gets tangled all around the brush bar.
Cleaning out the brush bar the first time was a PITA, and took both DH & I to get it cleaned and put back together. But it made a huge difference in the suction.
We rarely lose suction, but when it happens the first thing I do is straighten out the hose while the machine is running. I use the hose for a lot of detail work and often there will be small toys "hiding" under the fridge or furniture that get sucked up and may not affect the suction until enough other stuff gets sucked up around it.
If it's not the hose I will pop off the clear bin, empty and wash it out.
Then clean the filter (manual says about every 6 months), wash and air dry, and if that doesn't do it we tackle the brush bar.
Did you get a manual with your vacuum? Was it new at auction?
Before paying for service I would follow the manual and clean it well myself. It's possible we can find a manual online for your model if you didn't get one. We almost took ours in one time, but DH kept looking at it and we realized it was just a bunch of cut hair wrapped a bazillion times around the brush bar. Soon as we cleaned that out it worked great again.
I hope this helps!
*Tink