Calypso and AquaSmart work nicely for pillows.
AquaSmart, I fill to slightly above the minimum level with 100°F water* via Diagnostic mode. Lay the pillow over the impeller, run the Delicate cycle in HE mode with the (2hr) Soak option. Flip it over halfway through the soak period. Delicate for some reason doesn't recirculate during the soak period so I usually run the pump in recirculation mode via Diagnostics a few times during the soak to douse the top of the pillow, just because I can.
*by setting the tankless at 105° and running the hot valve to the needed level