If your iPhone or iPad seems like it's taking an eternity to charge, it may not be a problem with the device or the charging cable.
Graziano recommends using a toothpick or bobby pin to gently clean the lint or debris out of the clogged lightning port. If that doesn't work, try using a can of compressed air to remove the build-up.
Restart and reconnect your phone, and it should charge more quickly. If you're still encountering problems, it may be a more complicated software error, or you may need to buy a new charger.
Take charge, Apple users!