The 28-year-old mum, from Derby, said: “When you shop in a store and see an item that has a hole in it or a mark, quite often on white clothes which has a foundation mark when people were trying them on.
“Any sort of fault, you can get a discount. The discount is usually 10% off, unless it’s really, really bad.”
It makes the item non-refundable but customers usually can get some money off, she added.
Rachel continues: “All you have to do is to go over to the cashier and they will call somebody over to discuss the price with you.”
She also revealed the best time of the year to nab a bargain at the already-cheap clothing store.
“At the end of July to the beginning of August, they get rid of the summer stock,” Rachel explains.
“At the end of January to the beginning of February, they get rid of the winter stock.”
While not every item is reduced, customers can pick up some bargains “if they get in there quick”.
Since being posted, it has been viewed more than 300,000 times and liked more than 35,000 likes.
But this isn’t the only Primark Secret Kellie has revealed.
She has eight other videos where she details what certain codes mean, why Primark doesn’t sell their stock online, how to pass an interview for a job there and more.