Works on both high efficiency and non-high efficiency machines: Safe to use with Front Load Washing Machines and Top Load Washing Machines. This Lavender fragrance effervescent tablet is suitable for cleaning septic tanks, front load washing machine, top load washing machine and conventional washers, keep your machine in a safe, neat and organized working environment. EFFECTIVE PERFORMANCE: This solid washing machine cleaner has triple decontamination and active oxygen decontamination features which has strong dirt removing performance, can effectively clean the harmful and stagnant dirt even if it is invisible. Easy to use: just empty your washer, put 1 piece of effervescent table into the drum and carry out "clean washer" cycle, no need to disassemble the washing machine, you can get a fresh and clean washer. Unique Foaming Action Empowers You To Live Your Dream While Your Washing Machine Cleans Itself.