Antibacterial soap can be really harsh so it's a better idea to use antimicrobial. Dial makes one. I think its called Dial Gold but I'm not entirely sure since I don't use it.
I would recommend you don't use Neosporin, Polysporin or anything like that on a ear piercing. Soap and water will do just fine. These products are not to be used on puncture wounds (read the tube). If the piercing is infected washing with diluted antibacterial soap and irrigating with water twice a day will make a big difference in about 24 to 48 hours.
18 Gauge
Normal ear piercings are 18 gauge.
Probably about the same, but 10ga is huge for ear piercing.
18-16 Gauge
"0" is 8mm
No, you shouldn't be using salt on the piercing at all if it is infected. Wash the piercing using lathered soap, work the soap into the piercing and then irrigate the piercing with running water while rotating or shuffling the jewellery to rinse the soap and infected dishcharge from the piercing.
It is normal for a lobe piercing to be 16 or 18 gauge... but it is normally 18. A 16 gauge is normally used for tragus piercings :)
Well there actually is no such thing as an ear gauge. However there is such a thing as a jewellery gauge which is the thickness of the of the jewellery based on either Millimeters or AWG (American Wire Gauge as used in the professional body piercing industry.
20g. But that's a regular ear piercing size. So you'll move up to 18g.
a lot if u want to get size 10 gauge u should get the normal ear piercing size which is a size 20 or 18 gauge and slowly gauge it to a size 10 gauge
Well that would be a hypertrophic reaction, this is a reaction to the so called "cleaning product" you are using. Stop using it and wash the piercing with lathered and diluted antibacterial liquid soap and plenty of water once a day, ensure you flash the piercing with lots of warm water after cleaning with the soap. Use nothing else on the piercing, the bumps will ease off in a few days and the piercing should return to an almost normal state. Throw the "cleaning product" in the garbage.