I typically use columns with plastic fittings over each end, so I can remove the end and install the cotton firmly before adding silica. Today, I've chosen to make life interesting and try something new, namely the fixed column (with stopcock).
So, outside of using something very long to mash the cotton into place from the top of the column, does anyone have helpful tips? I've been using a rather large piece, maybe I'll try a very small piece that might wedge itself into the bottom.
Just a curiousity.