Repairing fogged windows

I have done several of our windows, and yes, it is doable for a DIY project. I used a sharpened 1.5" putty knife to cut the seals on the first window. It took forever. I then used a Oscillating Multifunction Power Tool with a flat sharp cutter blade to cut the seals, what a difference. Only takes about 10 minutes to do a whole window. Be carful with this tool as it will scratch the glass, if not used carefully. You need to use the required super spacer of the correct size. For the edge seal both the recommended sealing caulk, and 3M windshield sealer. I recommended the windshield sealer, as it seems to make a tighter, more secure seal than the recommended sealer. Just check the date on the tube as it is only good for 1 year after the date. I did ours in early March this last year, and choose days that were warm and dry, and did the edge sealing outside, and used weight to insure the panes of glass were tight and would fit back in the frames.