Place chicken breasts in a slow cooker and cover with taco seasoning. Add cream cheese and water.
Cook 2-3 hours on high, 5-6 hours on low. (May need to cook a little longer if chicken frozen.)
Preheat oven to 400 degrees.
Shred chicken with two forks in your slow cooker, then add cheddar cheese. Stir to combine.
Place a small amount of chicken mixture on each tortilla, then roll each tortilla up, placing them seam-side down on a baking sheet.
Brush each taquito with melted butter, then bake for 8-12 minutes until edges start to golden.
Serve warm with salsa for dipping.
Notes
To turn this into a freezer meal:Add chicken, taco seasoning, cream cheese, and water to a gallon-sized freezer meal bag. Squeeze out as much air as possible and seal bag closed. Place freezer bag into freezer and it will last 60-90 days. When ready to use, spray inside of slow cooker with non-stick cooking spray and dump ingredients from bag into slow cooker. Place the lid on top. Cover and cook on LOW heat for 6-8 hours (or HIGH heat for 3-4 hours). Follow the rest of the instructions as written.You can also freeze this after the taquitos are assembled and then just reheat them in the oven or microwave.