Khloe Kardashian gives Kylie Jenner tips how to catch cheating boyfriend.

Khloe has taken her time to advice and give her younger sister Kylie Jenner who is having some doubts about Tyga’s faithfulness ways to catch a cheating boyfriend.Read her suggestions.

“Khloe taught Kylie how to be Dick Tracy,” a source tells HollywoodLife.com EXCLUSIVELY. “When Lamar [Odom] was cheating, Khloe used to go through his clothes and smell for women’s fragrances. She’d sift through his collared shirts to see if there were lipstick stains anywhere on them.”

“She told Kylie that when she rides in his car next, to program the passenger seat to her personal settings,” the source explained. “Khloe said if the setting have been changed the next time she gets in the car, to check Tyga on the spot!”

One last thing,

“Khloe also told Kylie that if Tyga comes home and immediately has to take a shower or bath, something is up,” the source adds. “And she told Kylie that Bruce [Jenner] was 1,000 percent right when he advised her to give Tyga the chance to talk.”