I've had some issues with my main drying towels becoming hydrophobic. I used P&S Rags to Riches and this has helped. But at $1/wash looking for something else for regular washing.
The Rag Company had a video (well two actually). The new one just promotes Rags to Riches, but the one from 6 years ago they recommend Optimum Power Wash and vinegar to finish (in the fabric softener bit - although they wrongly said bleach compartment).
Funny when I typed this search in to OzB the ads came up with 2 products - both cheaper than R2R.
Bowden's Own Microfibre Cloth & Applicator Wash & Restore 1L @ $21.95/L - 20mls/wash so 44c/wash j- even less with Ebay Plus.
Mint MWash @ $50/4L + shipping (so say $60/4L shipped) - 50mls/wash so about 75c/wash.
Or something else and just use the R2R regularly if they become hydrophobic?
I've used thr Bowdens wash for a fair few years now with good results on both cheap nasty and good qaulity microfibre cloths.