Difficulty in inserting key into the lock - needs a locksmith
 

I have my Chevy cruze 2005 and i'm hav ing a big difficulty with it door lock. It found very difficulty in inserting the key in to the door lock on the driver side. some times it becomes impossible to lock or unlock and it forces me to get in to the car from passenger side so i can unlock the driver's side door. so i badly frutrated with this issue i needs a locksmith who can fix this issue asap. if anyone knows about it kindly suggest me about it.

dip the key in clean engine oil and work the key into the key cylinder. Don't get rammy, take your time.

when you get your oil changed make sure they lube the door locks and door hinges.