CaptainPlanet

I tried to wipe it off but it got pushed further in instead. I got lazy and put the screw in already, but after sleeping on that I realize I should do something about it. How to remove the grease from that tiny screw hole? What can I use to flush it out? wd40 is the only thing I can think of but doesn't seem right because its residue is still slippery

jimc101

leave it, it wont make any difference to anything

Crankycrank

+1. Might even prevent the bolt from corroding, a good thing.

CaptainPlanet

Do the brake mount screws ever get lose enough that it falls out of socket? I currently don't have loctite inside the mount post when I screwed it in.

Iride01 

If you tighten them properly grease won't make a difference. And many times I put a light coating of grease on threads just to help with corrosion or even to help tighten it properly.

There are very few things I've found that really need thread locking compounds (Loctite).

tomtomtom123

If you really want to get the grease out, you could use some pipe brush, like the stuff that children use for arts and craft to make bendy sculptures. They're just a few cents per piece. Soak the brush in degreaser and brush it into the hole. You may need to repeat a few times with a clean brush soaked in more degreaser.

I use the pipe brush when cleaning my chain by sticking it in between the chain link plates, while the chain is still on the bike. I don't have one of those mechanical chain cleaner tools but the pipe brush does something similar except much slower and less effective.

easyupbug 

Good advice above, don't take it out. That grease reduces the torque needed to achieve the very slight elongation of the screw which is the clamping force of the joint (tension). So for the same torque applied by you with the hex wrench the clamping force is increased, improved.