My phone is in an endless reboot

I have an iphone 6s, i was on my phone for like 5-6 hours straight. I was on 9gag then my phone froze so i shut it off.Soon after it went in to an endless reboot. I tried everything but still nothing.Im planning to bring my phone to an apple store tmr.It is ok to leave my phone rebooting over night?

Does iCloud Backup Take up more space then iTunes backup?

When I backup my iphone on iCloud it takes up 4.7GB of iCloud Storage.

When I backup my iphone on my mac with iTunes it only takes up 2.3Gb

Apple webstie says itunes backup will backup your phone exactly as it is and that iCloud only backs up important information.

So why does backing my iphone take 4.7GB of iCloud space but backing up my iphone with itunes takes up only 2.3gb of space on my mac?

Is negative ions bad for electronic equipment?

I have purchased a negative ion emitter and it is supposed to be arriving next week, but when I researched more about these units and about negative ion itself, some studies have shown that ionizers can induce a static charge on nearby objects, so will this destroy my computers (a desktop and a notebook) ? My iPhone? My other electronic devices?

Has this happen to anyone else?

I have an iPhone 7 and I dropped it, it's screen was cracked so I put it in my dog's mouth (someone told me this was a good idea) so my dog had to go to the hospital and have shards taken from their tongue, but my phone screen was still cracked, so I put it in the dryer to melt the glass back together, and that didn't work, so I'm putting it in the microwave now, how should I set the settings?