The only time I've stuck a sparge homebrewing, I just just wrecked the bed by stirring it all around and re-vorlaufing. Takes a while, but it eliminates all the crap you normally have to go through.
Now when I stick a mash on the 100 bbl system at work...that causes a slight headache.
Jeff, Brewer, Troegs Brewing Company, Harrisburg, PA
"No, just do it right, damnit!"