hey guys. lately I've been felling that my macbook pro 2012 mid got little bit slower. i just upgraded him not long ago like 2 months ago with a brand new samsung 850 eve 250GB SSD and restore it so pretty much i don't have alot of apps installed... lately I've been feeling slowing down in the safari when I'm trying to lunch new websites... at the begging after i upgraded the macbook with the ssd and reinstall the software the macbook worked perfectly fine faster than ever... i didn't upgraded the ram yet so I'm still with 4GB i was thinking maybe to upgrade to 8GB or 16GB i don't know i was hoping you guys will advice me... my usage is only internet and some office work no more than that. its a 2012 macbook pro mid 13 inch non retina. is there any way to clean it? or check what makes it slower lately? I'm sure there is no virus on it because i barely have any app on it..