When it comes to beauty tips and tricks, there's a lot of information out there. How can you separate what really works from what doesn't? The answer: You ask Gretta! Rachael's fashion and beauty buddy debunks common myths and recommends affordable products that do work.

1. Hemorrhoid cream can reduce puffiness under the eyes - MYTH

After trying it over the course of four days under both eyes, Claire found it just smelled bad and burned!

"Eyecreams are expensive," says Gretta. "That's why people want to believe it works."

Gretta recommends: Dr. Dover's Skin Effects available at CVS pharmacy.

2. Cooking spray dries wet polish faster - MYTH

Joanne sprayed her fingernails with cooking spray after a manicure. The only thing it did was make a mess!

"The oil in the cooking spray creates a barrier so that it creates some slip so you don't smudge as much," says Gretta. "It's a total myth that it dries it quicker."

Gretta recommends: Essie Quick-e drying drops, available at salons and beauty supply stores

3. Mayonnaise makes a great hair treatment - MYTH (with a little bit of truth)

Jen worked spoonfuls of mayo through her hair and she found it worked beautifully. Of course, she did smell like a tomato sandwich the entire time!

"Mayonnaise is water, vegetable oil and egg. Everyone thinks the egg nauturally conditions the hair -- it doesn't," says Gretta. "The vegetable oil gives a little bit of instant shine because it actually coats the hair but it's going to build up on your hair over time, making thin, fine hair not as full of body."

Gretta recommends: Dove Advanced Care Sheer Moisture spray for condition and protection, not just shine.