Jerry and Gary, Hopefully I can be of assistance. Yes that is the Acrysol I am talking about. It is the only product that I have found that will dissolve RTV silecone but not hurt the surrounding surfaces. You still have to exercise some caution so start in an area you can learn from and get a feel for it. Make sure you mask off areas with quality masking tape and plastic. You will see the feathered edge of the silecone start to wrinkle in about a minute after brushing on the acrysol. I use a nylon windshield installation tool with a 30 degree angle on the end but you can get creative and fabricate something......maybe an old kitchen spatula or something.
Gary, sometimes dirt and debris accumulate down in the slider track and plug the weep holes in the frame of the window. If that is not the issue, removing the window is a 2 man job. Carefully run a razor knife edge around the top and sides where the sealant is at the window frame. Install masking tape as a guide so reinstallation will get back in the same location. After removing the valance and screws, start pushing at a corner and have the other person ready on the outside. Purchase weatherstripping from your local dealer 3/8" by 1/4" thick with 3 ribs or something similar from Ace hardware.... soft so it will compress and seal. Reseal the outer edges with clear rtv to match the original application. Have fun and be patient, Regards Fred