I have never tried ‘probiotic’ washer cleaner before but I love it.    I have a front loader and even though I’m able to keep door open there always seems to be a smell.    This product removes mold, residue and lime scale from washer.   Safe to use and had no harmful chemicals.   Pour 1 packet ( 6 in box). Into detergent dispenser or drum.  Wait for it to for probiotic to activate (1-12 hours) then run a rinse/ spin cycle on cold water.    Leave washer door closed at least 6 hours or overnight and your washer is ready for normal use again.   Seems like a long time to wait but it really made a difference in my washer.    It continues to make your clothes smell fresher so I’m sure they’re cleaner.    Apply again once a month.  You won’t be disappointed!