Oh hey that fixed it, Thank you so much!

Haven't ran this game in over a year, but I got back into playing it and I've just noticed how the goo is killing instantly. Wondering if there is some way to fix it? It's getting somewhat annoying while practicing runs. I've tried uninstalling and reinstalling the source unpack and doing the same to both hl2 and portal on steam. It seems to only do it in portal, and reinstalling hasn't fixed anything yet. Just wondering if I'm missing a simple solution, or if anyone else is running into this as well.

Here's an example if you need one: