I think you are doing it wrong. Pot Roast:
HALF FROZEN Roast Steak is required for this. PRE HEAT your crock pot to high. Coat your Roast Steak in Lawry's Garlic Salt (do not like any other) and pepper then top with Warchestershire sauce - 1/4 cup. Cook for 2hrs. Then reduce the heat to med high and add veggies, bite sized - no crazy chunks please - potatoes, carrots, whole tomatoes (canned) with juice, celery are my "go to's" here. Cook on med high for another 4hrs. I literally layer the crock pot vs stir things in - Meat/juices - Potatoes - Carrots - Celery - Tomatoes and I do not "mix" them up - the potatoes may soak up some of the juice in cooking but not much - you will not get greasy yuck if you do it this way.
Another option works best in an oblong crock pot:
Cook Ground Beef (I like about 2lbs) or you can cook a Roast Steak in the crock pot on high for 4hrs (yes, half frozen), season with "taco" seasoning of your choice. La Victoria (my choice) enchilada sauce layered on the bottom of a preheated (med) crock pot with 4-6 white corn tortillas layerd (cover bottom). Then layer ground beef, sauce, more tortillas, ground beef, sauce, tortillas, cheese (good gooey layer) and cover - cook 20-30 (cheese bubbly) on med and you are good to go! You want it to appear saucy when you put it in to start cooking because the tortillas soak up the sauce. This is bascially an enchillada casserole, you can serve with rice and beans and sour cream (greek yogurt) and guac on the side MMMMMM
Okay, one more
Chili:
Ground Beef (about 1lb) cooked and FINELY crumbled. This needs to be very finely crumbled - I have even put it thru the food processor after cooking to get desidred crumble. In crock pot in the am put "Stew Meat" can be found in meat department cut up chunks, I typically put in 2-3lbs (my chili goes FAST!) with Lawry's Garlic Salt, Pepper and Warchestershire Sauce and allow to cook on med high - high for 3-5hrs depending. Once the meats are cooked add the seasoning packets of Carroll Shelby's Chili Spices (brown box looks like wood, used to be in a brown bag). Cayene is to your liking but keep the salt - salt + crock pot = YUM (and I typically do not cook with a lot of salt other than the Garlic Salt). Mix the meats up with the seasonings/juices from the meat in the crock pot - but DRAIN the Ground Beef! Add Light and Dark Red Kidney beans drained, but not rinsed (will reduce sodium, but you want some of the starches from the "juice"). I add two of each personally. Add 1 or 2 LARGE cans of Whole tomatoes (cut in half) with juices. You should have enough liquid, but if you do not you can add water, beef broth or tomaote sauce or a combo of the three to your liking. OOps! I added too much liquid - that is what the Masa Flour is for (comes in the pack). Cook for an hour.
I also like to take a small portion into my 1qt crock pot for my son and then add jalepenos and cayenne pepper for me and daddy to eat.
These are some of my "standards" in the crock pot, always come out PERFECT - just be sure to pre heat it like you would any pot, pan or oven!