It's a once a year type thing for the proofing caps, down care and some of the obscure ones, but they also do fabric softener, wool care, sports care etc - many of those are just regular cycles.
I'm just wondering, if you're not using fabric softener, if you just set cap dose, can you use the fabric softener compartment to dispense detergent instead?
I just assumed CAP dose sprays water thought the fabric softener compartment and then doesn't dispense softener at the end of the cycle at all.