FLs don't like suds because suds lack the density for the pump to get ahold of them.  And the low clearance between inner/outer drums allows suds to regenerate during spin.

Um, you know those 'exploding' washers?  The "fix" involves attaching a sticker saying NOT to wash water repellants.  Water won't spin out, gloms in folds/pockets, throws balance off catastrophically. 

Believe if I had water repellants needing washing I would do it by hand in the bathtub, take it to a professional laundry, or at very least CLOSELY supervise the machine during operation.

When I wash things that may retain pockets of water, like my Mother's mattress protector, I always select the slowest spin speed.   I still feel relatively safe due to all the redistributing tumbles prior to the actual spin.

Are almost always TL machines, FL washers tumble the water out of folds and pockets etc better so they are much likley to have a load spinning at 800 RPMs+ when the pocket of trapped water lets loose and the washer is violently ripped to pieces.

It does little good to monitor the washer while running [ in fact it might be dangerous to be near it ] And the unbalance systems CANNOT prevent this problem with loads that suddenly go out-of-balance, because the load was perfectly balanced until the trapped water is suddenly released, it is the same as dropping a brick into a washer spinning at full speed, NO washer ever built that spins at speeds of over 800 RPMs can survive this problem.

John

I use Zote soap flakes in my FL frequently without any oversudsing issues.  They smell like Ivory soap to me.