10% of people who had visited Five Guys in the last six months said the brand had the cleanest restaurants. 11% of people who had visited Whataburger in the last six months said the brand had the cleanest restaurants. 15% of people who had visited Chipotle in the last six months said the brand had the cleanest restaurants. 20% of people who had visited Five Guys in the last six months said the brand had the cleanest restaurants. 21% of people who had visited Panera in the last six months said the brand had the cleanest restaurants. 27% of people who had visited Starbucks in the last six months said the brand had the cleanest restaurants. Read more: Starbucks is installing needle-disposal boxes in locations across America following OSHA penalties and worker concerns about drug use in bathrooms30% of people who had visited In-N-Out in the last six months said the brand had the cleanest restaurants. 55% of people who had visited Chick-fil-A in the last six months said the brand had the cleanest restaurants.