I only stored my eggs pointy end down in a little tub before I incubated them, turning them a little each day in the tub. However, when I put mine in my incubator, they go on their side.
However, once they are in the incubator I have (the Rcom 10 Pro Plus) it turns them for me everyday, alters humidity and temp by itself and eventually at lockdown, it increases humidity by itself and stops turning!
Like
@Texas Kiki says, since you have a cheaper incubator, I'd recommend getting a more reliable thermometer and humidity gauge as the ones that cheaper incubators come with have been proven to be very unreliable. The screen could be saying it's 37.5 degrees when in fact it's much less or much higher.
As for disinfect, as long as you get something known to be safe to use on eggs and the incubator then I'd say go for it. I know many people that use it with success and many people that don't use any at all with success. It's mainly just down to what you want to use and how dirty your eggs are. I generally wouldn't suggest putting really dirty eggs in an incubator as they'd require quite a bit of washing which could potentially block the pores on the egg and prevent it from hatching. Also, don't put dirty uncleaned eggs in your incubator as it would most likely turn into a bacteria party in there!
Anyways, as you can see I put my eggs on their side but pointy end pointing towards the middle of the incubator...
And then they all hatched perfectly fine into these beauties...
Also, a quick pointer! Don't be tempted to candle to eggs to often. I only candle mine on day 10 and on day 15 before lockdown begins.
