I have used the 2x lavender detergent, it worked well & seemed to get the laundry clean. I bought the 4x lemon to try, wasn't very pleased with the results, I tried adding double the amount of detergent and it still wasn't good. I have a 10 year old front load HE machine and we have hard water. I added some borax with the detergent and got pretty good results. Then as an experiment I refilled the half empty bottle with water & shook well - then used a cap full of the detergent in the laundry along with the borax - the results were much better.