your mouth is the best tool, lol
I had a client with a 10k sft house and those things oozing all over and she asked me to “just get rid of it as I went thru”, yeah right. She had put window film on the inside, which probably wasn’t recommended
I just told her it would be so time consuming she would never want to pay the bill and guess what, next time I come back there will be more, besides she doesn’t want me possibly compromising her Pella warranty does she? Since that stuff is in place as a sealant etc etc. I mentioned her window film was no doubt worsening the problem as well.
on the outside, tucker brush and nylon bristles got rid of the shadow on the outside of the blob stuff real good, the bristles would be black after doing the job. If I was squeegeeing I would just run steel wool quickly around the border to get rid of the pre-blob-creeping shadow. Same on the inside with the steel wool if necessary
but blading that goop off, every window, no way