You can do a quick test to see if you are currently using to much soap by simply running the washer on a normal cycle and DO NOT add any soap. Also do not add any clothes but run it empty. Notice after about 5 minutes before it drains for the first time if you have soap bubbles on top of the water. You may need a flashlight to see into the drum through your glass door. You can also push the pause button an when you hear the click of the door lock release open the door to inspect. Now close the door and resume the cycle. The very first fill cycle is when the soap that is normally added gets mixed in with the clothes. Every fill cycle after the first drain is only to rinse the clothes. If you get bubbles after your last regular load, you were using so much soap that even with all the regular rinse cycles you were not able to totally rinse out the soap. This will shorten the life of your clothing as they are not meant to have soap in them when the wash cycle is over. You can also test to see if you have residual soap built up in your laundry by putting in a load of CLEAN towels that have not been used yet and run a normal cycle but DO NOT add any soap. Check again toward the end of the first cycle and see if you have any bubbles in the water. If you do, you have soap in the towels from previous washings.
Think about it, the soap manufacturer is in the business of selling soap and is not going to tell you to use less soap because that means less business for them. The manufacturer of your machine is also not going to tell you not to use too much soap because using too much soap will cause your machine to fail prematurely which means you will be a customer for them much sooner then you really need to be, which means more revenue for them.
