I have found a new love and it`s this combo of the PFM and Beadmaker sprayed about as drying aid....My question: do I need to worry about how it will affect the PFM towels over time? If I wash them properly, is there a concern of losing performance or becoming hydrophobic when using them with Beadmaker?
Welcome to Auopia!
Noting that I don`t use either Beadmaker or PFM Drying Towels..IMO it`ll be all about how well you launder them.
I do use SprayWaxes/etc. as Drying Aids, and I use them with plush MF Drying Towels that aren`t all that different from PFMs. I`ve been doing this for years now, ever since the *plush* ones came out as alternatives to WaffleWeave MF Drying Towels. Like you, I`m very happy with how the combo works.
So far, all those MFs still soak up water just as well as they ever did, zero change in performance. (Which is more than I can say about any of my WWMFs, which always, eventually, became less effective whether used "clean" or with a Drying Aid.) I don`t even make a point of washing them immediately after use; the SprayWaxes/etc. will often dry on them and stay that way for days until I finally launder them. I don`t pre-soak/spot unless they get badly soiled (by some residual dirt..gotta watch that!) or something else makes me think I should (not common). This approach works fine for me, although I wouldn`t recommend being so lax about it until/unless you know it`ll work for you.
FWIW, I wash in very hot water (often using the "Sanitize"cycle), with a dedicated MF detergent (note that some are so harsh that the MF vendors/makers say to avoid them, so shop carefully), occasional White Vinegar rinses, and I keep on rinsing until there is zero sudsing (and often do another clear-water rinse even after that). I then dry `em until they are fully dry, in the dryer on a lower temp. setting. Since my plush MFs stay nice for years and years (still using many from the `90s), I`m confident that this approach is both effective and sufficiently gentle.
Now, to possibly render all the above moot.....
BUT- Gee, look at what`s going on with KBs Toy and Gorram! They *are* using the exact same combo as you are, and they`re noticing diminished performance! Maybe it`s just their laundering, maybe it`s the BM...but, it`s happening to them. So maybe that BM at least requires some kind of really intensive laundering...or maybe it`s just gonna cause a slow death of the PFMs, forcing you to do a cost/benefit analysis.