On topic, I always clean my guns before I shoot them, Glock or not, just to make sure they are good to go and actually lubricated. There's only one gun I have that won't be cleaned by me before I shoot it and that's because I know who the previous owner is and I cam smell the gun oil on it from where it has been cleaned.
When I clean mine I use a rag to take off all the big stuff and then use Hoppes and Q-tips for the most part to get the small things. Then I use automotive wheel bearing grease to lubricate afterwards.
Grossly overlubricating handguns is one of the most common errors. Handguns only need microscopic films of lubricant and only on the critical bearing surfaces (see the owner's manual.) Any additional lube completely defeats the purpose of lubrication, which is:
- To make the gun run more smoothly, and
- To extend the life of the gun by reducing abrasion.
- It inhibits the smooth functioning of the gun, and
- It is an abrasive that accelerates wear and reduces the life of the gun.