There are studies on both PMRC in VT. and by Steve Childs, of Cornell showing that sap yield increase far out weighs the cost of new spouts. If you want to clean them, use SS spouts, or other metal spouts, they can be cleaned if done properly.
Why would you reuse a 42 cent spout so you could lose $2-3 or more worth of syrup. Penny wise and pound foolish.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.