Ya, but it makes the milk taste like crap!!!
I have experimented with it, but didnt like results. May have just not done it right though.
I find the best results with just removing the bait frome the foam tray, add a layer of salt, replace the bait the way it came out, and add another layer of salt. You can now store up to 6 or 7 trays in your bait box, and they maintain there shape, and keep forever...
Good luck...
Prowler....