We use our smartphones all day and night, so naturally, it’s is going to get dirty. Lifehacker’s here to help with a list of the seven most common ways your smartphone gets dirty–and the safest and most effective ways to clean it.

  • Debris in the charging port. Lifehacker recommends using a toothpick (preferably plastic, since that’s less likely to splinter) or a SIM eject tool, and gently cleaning out the charging area by “making soft scooping motions alongside the outer edges of the port.”
  • Dust obstructing the speaker grill. First, try using compressed air to clean out the blockage. If that doesn’t work use the gentle cleaning method from the charging port example.
  • Leftover food on the screen. If you’re out in public, gently wipe off food with a napkin. When at home, do further cleaning: “Place a tiny bit of dish soap onto a clean towel or cloth napkin and then rub it together under the faucet to create some suds. Don’t get it soaking.”
  • Stickiness. Try rubbing your thumb on the spot. If that doesn’t work, do the soap-and-water trick above–and, if that still doesn’t do the trick, carefully use the hard edge of something like a credit card to scrape at the stickiness.
  • Makeup on the screen. Try wiping off Koala spray, which doesn’t have ammonia or alcohol in it, with a soft cloth. Cleaning wipes made for your device also help.
  • A super-dirty phone case. Lifehacker recommends soaking the case in warm water and dish soap and then doing a deeper clean with a toothbrush. Method all-purpose cleaner also works
  • A dirty charging cable. The warm, soapy water on a clean towel trick is best here.

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