The following Everyday Savings Tip comes from, Beth:
You know how hard it is to read the measuring lines inside the cap of your liquid detergent? The instructions tell you what line to fill to for a normal load or a large load. If you don’t follow those guidelines you end up wasting money by using too much detergent.
I use a Sharpie permanent black marker to mark those lines inside the lid because they are close to impossible to make out on your own (I think they do that on purpose). It makes it a lot easier to measure quickly and I keep a marker in the laundry room so it is handy.