[cge10]

just like windows on a desktop every program stores stuff in your ram and run background resources which is why you are getting this lag i know its horribly annoying but the best thing you can do is go into hd tweaks enable some cache tweaks and run a ram cleaner every couple of hours. also you could try some different roms my experience with mighty's roms weren't so great but i used a really new build i found that silence roms or mr x and my favorite NRG's roms are really fast and reliable.