Try my Pawjuss Pets Cooling Collar or Cooling Mat, it really works! Full instructions with each order, but it's really simple! Soak the collar in water for up to 5 minutes, wring and then flick it. Then place it around your pets neck. They contain no gels or crystals so they are completely safe for your fur baby.
If you don't like chemicals then my essential oil Chemical Free Flea Collar is just up your street! Just load the bandana with the essential oils as required and those pesky bugs will stay away! They work for about 2 or 3 weeks sometimes longer. The actual bandana is machine washable. More instructions on the product page.