The Spike *can* be cleaned-in-place, but you'll have to remove the three ports--sampling valve, temp probe, racking valve-- to be able to get at the gunk that accumulates in them on the inside. I pull mine off and soak them in a small 2-gallon tub w/ PBW, while I'm cleaning the rest of it. I replace them with TC caps and then set it to cleaning using a CIP ball. But initially, I spray the fermenter out and drain the gunk out of the bottom, and that would be tough if it were sitting in a freezer.
i'm gun-shy of that fermenter tipping over so i have it strapped to a wall (i have a glycol setup). near my sink, but not right at it. when time to clean, i open the bottom valve and dump as much as i can. then i do a once-through pass of clean, cold water through the cip ball (hot would be better but figure good enough). this gets most of the crud out of there. then i recirc with a hot pbw solution for a half hour or so. outlet drains into a bucket with a sump pump, pumps back up through the ball. then i do a once-through with clean, hot water, again through the ball. that hot water gets collected and then i disassemble all the tc pieces, placing in the bucket of hot rinse water with a little more pbw. cip ball gets most everything out of there but once in a while, i need to use a sponge to grab the last bits. rinse the tc parts, place on towel to dry, call 'er a day.