Works on both high efficiency and non-high efficiency machines: Safe to use with Front Load Washing Machines and Top Load Washing Machines. 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. This effervescent lavender fragrance 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. Easy to use: just empty your washer, put 1-3 piece(s) 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. Eco-Friendly Tabs - Natural Effervescent Foaming Tablets Are Septic Safe And Made With Less Packaging . Compare To Liquid Descaler And Wipes That Create Unnecessary Waste