I have my scion XB 2008 and the ignition lock starts sticking periodically, and I discovered that it sticks when inserted one way, but not the other. i dnt know what's the issue so i need the support of locksmith. if someone knows about it plzz inform me about it

 

do you have a spare key you can try? also you can use some graphite lube to help it unstick

 

Yup, get some dry graphite powder and use that to lubricate the lock cylinder (do not use any liquid lubricants, they just make it worse). Also trying another key can help.