How to remove window sealing (transparent "caulking") off of windows?

I can do most of the jobs just pulling on it or removing with a swiss knife but there's still a thin layer of the transparent sealing on the side of the windows. I would scrub with a metal brush but I'm afraid of removing the paint.

Any adice of how to remove this?

Answers:
take a "5 in 1" blade.......looks like a putty knife but has 5 different uses.......( lowes) use the pointed end to dig the remaining caulk out and to cut it out.

lic. gen. contractor

Other answers:
There are tools that help...
How do I change the color of the vinyl siding on my house without replacing it ???
  • substitutions for a flathead screwdriver?
  • Does a #8 bolt have 8 threads per inch?
  • How to not splinter plywood when cutting with table saw?
  • Can I leave electrical wires from an electrical box unwired to anything?
  • How do you test a hot water heater element?
  • How do you get the face plate off of a double keyed deadbolt lock?
  • How can I repair a broken cement urn. Is there a glue?
  • How to preserve cool this summer?