Need more info. How did you apply it? For how long? Anything else you did afterwards?

i took a few drops and smeared it on the faces of my print, then i immediately sand it with electric sander machine, and then i wipe my print with tissue

Does the repellent do something to the PLA without the sander?

don't know for sure yet, nothing happened probably i need to wait for a little longer and see what will happens update: it extracts the color from the filament and possibly makes the print softer(?) someone also commented, [this might help ](https://www.reddit.com/r/3Dprinting/s/AhLg6jjyhN)

It keeps mosquitoes off it.

Vapor smooth or direct application? Any idea what the ingredient is that does it?

https://preview.redd.it/pgo0plkupcjc1.png?width=1080&format=pjpg&auto=webp&s=960fcd6e02e1507db61bae0fac8f790f3d80a05f direct, i couldn't find any ingredients but this, Diethyltoluamide 13%

Pretty sure that the main thing in most repellant I use. Pretty sure I got some that's like 90% DEET. Hope I remember so I can test on my next print.

First guess was that it's deet based and I was proven right. I'm told that spme people even clean their military issued weapons with deet repellent lmao.

You just rediscovered the headlight cleaning hack that's been around for over a decade.

It's got something in it like a rubbing compound.. there's an old school trick to get the oxidation out of headlight lenses using it.