I am a lawn care professional from PA. I got hit hard last year as most of you have with the cost of post emergent for crabgrass. We decided to add liquid dimension to our second round broadcast spray for weed control. We just started this on Friday and spent most of the day cleaning out our screens on our Perma Greens and our nurse tank. We are using dimension 2EW and Trimec 1000 together in our mix. It seems that no matter what we try it keeps coagulating(spelling?) or clumping up and clogging the filters!!! Has anybody else done this and what are some of your thoughts as to why this is happening??? Help is greatly appreciated!