When you slice something in this game only half of the item slices. You are grabbing the half that did not slice. Grab from the other end and you will get a slice to toast
hi please make a cup of coffee
done now please 2 slices of toast on a plate
bread? on table by plate
knife? put that piece down the rest will be sliced
bread? You just sliced it, grab from the back not the front for the slices