In wrong catogory but wasn't one for this. A very, very, odd spider.Want to know what kind ..& how to kill it.

Question:I went into my kitchen and set my phone on the counter next to the fridge and grabbed a spoon out of the silverware basket we have on the counter. as I reached for a spoon across the counter I noticed a little dark grey bug no bigger than a 3or 4 yr. old's pinky nail it was really,really,really fastly scampering up the side of the fridge. it wasn't the usual way you see a spider walk it was kinda, like, almost actually scampering up ;the fridge. So I just thought it was a little bug and leaned in to get that spoon across the counter. as i leaned in my face met very close to the fridge and i noticed it had 8 legs! it was a spider!! It was kinda the body shape of a widdow in how the head is tiny and the butt is huge and round, but in this spider the head was tiny and the butt WAS big yes, but very flat like a tick's body is flat. the coloration is dark grey and has only one long light grey stripe going accross its back. i need to know what kind of spider ppl think it is & provided pics.

Answers:
I don't know what kind of spider it is but a know raid ant & spide killer will kill it.