make sure the tube from the precleaner, venturi, to the exhaust is open. Also all the tubes in the precleaner must be open. Your problem should not be happening every day. Maybe every 500-1000 acres but not as you say.
If you are cleaning the filter and the asperator every day you may have a bad seal on the rotory screan. Also check the yellow wear strip under the rotory screan. If you see black areas on the yellow seal, you need to change that also. One of my 2388s was plugging the filter and asperator almost every day. The seal did not look that bad but I changed it any way and it made a world of difference.
We have found that the seams inside of the rotary air screen allow bean dust to get inside also. Whenever we find a buildup on the inside of the screen we blow it out and use silicone sealer on all the seams. Also very important to completely clean out the precleaner as they will buildup and not work correctly even if you get the dirt leaks stopped.