My new most favorite quilting tool!
Blue Line Eraser!
Three Piece Kit! <click here>
I love this stuff! It really takes the water soluble blue lines out. This kit has a water soluble blue marker in it which has a nice, fine point, a spray bottle of *magic* remover liquid and a refillable pen which you fill with the liquid and you run the point along your blue line marks and it erases the marker immediately.
I use the refillable pen for marked lines and dots, etc., as it pinpoints the remover liquid right where I need it. And I use the spray when I want to remove an area that has lots of markings on it.
I carry it here at Bobbins 'n Threads but you can also get it on the Blue Line Eraser site: