I have had significant buildup a couple times (in the Spring) and before seeing my doctor, I had gotten and in the ear camera... for my iPhone... so I could look and it came with a little scoop to get wax out. I can’t recommend it other than for looking. But it was useful.
I see my doctor every six months and he tells me if there is any buildup. A couple times he had his nurse us a gismo attached to the faucet that would spray warm water in and wash the wax away. It was very effective (no bees in there). However, it was one of the loudest things I have heard... I am not sure it is good for your hearing.
After using bulbs and hydrogen peroxide cleaning agents made for the ears. I found something far simpler and I am sure much safer than using the professional ear jet. When in the shower every week or two I just gently apply a little bit of bar soap with my finger around the perimeter of my ear channel and then gently wash with my shower wand by indirectly spraying warm water into my ear. It is easy to get the spray so it causes a rotation of the water in the ear. It effectively washes out the ear without the incredible roar from the professional tool. My ear channels end up clean as a whistle like the rest of me. No syringes and special equipment needed.

