There are a number of different products currently on the market designed specifically to easily clean your glass oil rig. Most of these products are relatively expensive for how frequently they get used.
There are two main kinds of oil rig cleaners: soak and shake cleaners. Shake cleaners required the cleaner to agitate (shake) the oil rig; these cleaners often have small granular chunks that rub against the inside of the oil rig helping scrap off THC resin.
Soak oil rig cleaners are designed to have the cleaning solutions left in the bong for a while. (more than 30 or 60 minutes) These cleaners absorb the THC resin and flush it down the drain. This is a longer process and not ideal if you are looking to use your oil rig soon.
Both of these styles of products work well to clean an oil rig, but there is a simpler solution. Using both rubbing alcohol (as concentrated as possible, 99% is ideal) and salt, as well as soaking in rubbing alcohol, will clean your bong very quickly and should cost less than a dollar per clean.
The rubbing alcohol dissolves the THC resin and should be left to soak as oil rigs get coated with sticky reclaim. The salt can be added to the solution so it can be shaken and the salt will rub against the inside of the bong, helping scrap the THC reclaim off.
As for cleaning your nail, you can torch it clean (titanium, ceramic, or quartz) or submerge it in rubbing alcohol and let soak. (titanium & quartz)
The combination of rubbing alcohol and salt creates a great mixture to quickly and affordable clean your glass oil rig. With most of us using our favourite glass piece daily, keeping it clean can be a lot of work. Hopefully using rubbing alcohol and salt can save you some time and money!
PS If you just use rubbing alcohol and no salt, you can collect the rubbing alcohol and THC mixture in a dish. If you slowly heat the dish, or leave it out in the sun, the rubbing alcohol will evaporate leaving a highly concentrated THC resin, which has already been activated. So this stuff is ready to mix with some butter and make your favourite edible with.