Alright, this is addressed to the more recent Liquidator (LQ) owners.
When I got my LQ, I noticed how, when filling the funnel with bleach, the level of liquid in the funnel would drop below the level in the tank. That is because liquid chlorine is more dense than water, of course.
What I did not notice, over time, is that it was taking longer and longer to add the bleach without overflowing the funnel. A few days ago, standing in the hot Texas sun, I realized it was taking about 20 minutes to add two gallons. Waaaay too long. Something was not right. And not fun.
Lacking any better sort of tool, I raided our closet and straightened out a rubber-coated wire clothes hanger. Stuck it in the funnel. Could not push it through. The bottom of the funnel was all caked up. Eventually, something that looked like salt started falling onto the bottom and I made a hole.
The next two gallons took about two minutes.
Sorry, no scientific info here, but cleaning the funnel periodically may be a good thing.