What are the most effective deet products for repelling fleas?

The most effective DEET products for repelling fleas are those that contain a high concentration of DEET, typically around 20-30. Look for products specifically designed for repelling fleas, such as DEET-based insect repellent sprays or lotions. It is important to follow the instructions on the product label for proper application and reapplication to effectively repel fleas.