Keeping the air moist seems to make the scrubber media last a lot longer (especially here in Denver where the air is really dry). There was a recent thread (which I can't find now_ that described DIYing a mini humidifier that you put in line in front of the scrubber, I gave it a try and I think it helps a lot.
Basically just get a small plastic jar or something with a screw top lid, and drill two holes in the top that are just slightly smaller than the tubing (so you get a tight fit). Run some tubing from the jar to the intake of the scrubber, and leave it sticking just down into the jar. Stick another short length of tubing in the other hole, also sticking just down into the jar. When the jar is mostly full off water, it will draw air in the short tube, across the water surface, and out the other tube to the scrubber. Don't fill the water up too high or you'll get bubbling noises.
I found that thread:
https://www.reef2reef.com/threads/co2-scrubbing-an-unexpected-journey-chasing-numbers.305924/
There's a good picture in the first post, using an empty Acropower bottle.