The bottle shows the sunblock is pediatrician tested and recommended by the Skin Cancer Foundation.
"Multiple times during the day we had the kids come out of the water, dried them off completely and then reapplied the sun spray as directed," Sayers said.
Sayers said she even sprayed the sunscreen into her hand so she could apply it directly onto her child's face.
"To make sure they're actually getting the coverage they're supposed to," she said.
Sayers said she followed the bottle's directions and her son was fine on the way home from the beach, but the next morning was a different story.
"When he got up for the day, his eyes were almost swollen shut, he had swelling and blistering all over his face, primarily on his cheeks and nose," Sayers said.
"I can never guarantee to a family you won't get burned despite doing all of the right things," Dr. Eric Freeman, a pediatrician at Old Dominion Pediatrics, said.
Dr. Freeman said spray sunscreen is just as good as lotion sunscreen, but he recommends parents also buy different types of sunblock for the face.
"We look for sunscreens particularly for those sensitive areas that include zinc oxide or titanium dioxide," Dr. Freeman said.
The Banana Boat spray does not include those ingredients.
CBS 6 reached out to the makers of Banana Boat, Edgewell Personal Care, about Liam's burns.
The company sent us the following statement:
"Nothing is more important to us than the well being of the people who use our products. Consumers can rest assured that Banana Boat products provide safe and effective broad spectrum UVA and UVB protection when used as directed on the product label, and with other sun protection measures as necessary."
Other parents can also provide recommendations on sunscreens.
Dad Jeff Dowdy said he does his homework before heading to the store.
"We actually found the research shows just a standard Target brand actually performs as good or better than some of the others," Dowdy said.
RELATED: Here are the top sunscreens dermatologists use:
The Sunscreens That Dermatologists Wear Every Day
Child suffers second degree burns after applying sunscreen multiple times
"I wear EltaMD facial sunscreen daily. I love it because it's broad spectrum, fragrance-free, lightweight, clear (no white residue!) and it can be applied under or over moisturizer."—Dr. Anne Chapas, New York City-based dermatologist.
"CeraVe’s sunscreen for the face contains invisible zinc, ceramides for hydration and niacinamide, which is good for patients with any baseline redness. This sunscreen is lightweight and is also water resistant for up to 80 minutes.
"I always also apply (and recommend that my patients do, too) an antioxidant prior to sunscreen application. UV rays create free radicals that cause photoaging of the skin, damaging DNA, proteins and lipids. The antioxidant helps counteract the rays that get through the sunscreen, acting as a double barrier." —Dr. Tina West, a Chevy Chase, Maryland-based dermatologist
CERAVE SUNSCREEN FACE LOTION WITH SPF 50 via target.com
"I wear Elta MD UV Clear on my face and neck daily. Over it, I apply Colorescience Sunforgettable Primer, a tinted, moisturizing product that I use instead of foundation. I always keep Colorescience Sunforgettable Mineral Sunscreen in my bag so I can reapply SPF over makeup during the day.
If I'm playing sports, swimming, walking around outdoors or even sitting in a stadium in a sunny climate, I instead use Blue Lizard Sport for both my face and my body–it contains physical and chemical sunscreens in a very water-resistant base. Then I apply Headhunter Warpaint, a surfer preferred sunscreen, on the areas that get the most sun, like my forehead, nose, jawline and hands."—Dr. Heidi Waldorf, director of laser and cosmetic dermatology at Mount Sinai Medical Center in New York City
"I use MDSolarSciences Mineral Creme SPF 50 on the body and the brand’s tinted lotion on the face. Both feel smooth on the skin, are non-irritating and provide great, broad spectrum coverage. The tinted version gives the skin a nice, even tone." —Dr. Diane Berson, associate professor of dermatology, Weill Medical College of Cornell University
"I wear Biopelle's Stop The Clock on my face every day. I like it because it has a physical block (zinc) but doesn't leave a white film. It contains DNA repair enzymes—quite unique for a sunscreen—and antioxidants. Plus, it’s fragrance-free." —Dr. Joel Cohen, associate clinical professor of dermatology at the University of Colorado
BIOPELLE STOP THE CLOCK BROAD SPECTRUM SPF 50 SUNSCREEN WITH DNA REPAIR via biopelle.net
"I always use EltaMD UV Shield SPF 45 on my face, but when I'm going to be out in the sun, I'll also use Aveeno's lotion sunscreen. It’s relatively cheap, so I can apply it liberally on skin when hats and sun-protective clothing aren't enough." —Dr. Jason Reichenberg, director and associate professor of dermatology, University of Texas at Austin and Seton Healthcare Family
AVEENO PROTECT + HYDRATE LOTION SUNSCREEN WITH BROAD SPECTRUM SPF 30 via target.com
"My daily facial sunscreen varies between two products: NYDG Physician's UV Defense SPF 30 and Elta MD UV Clear SPF 46. NYDG's has a light milky consistency and spreads easily over large surface areas. It's fragrance-free, gentle on even sensitive skin types and has the added benefit of green tea extract—a potent antioxidant that can reverse skin damage, stimulate microcirculation to the skin and slow the aging process. It's also a physical barrier sunscreen (micronized titanium dioxide) and provides excellent UVA and UVB protection.
"Elta MD's contains the anti-inflammatory niacinamide to help prevent unnecessary breakouts. I love that the silky consistency allows for a smooth, sheer application." —Dr. Jessica Weiser, New York City-based dermatologist