Why wait for your carpet cleaner to check for pet issues with a UV black light when you can DIY it! All you need is a black light. We use this one and suggest you do too. There are many on the market but we found this to be the best value and most powerful for the price. A UV or UltraViolet light can emit various UV wavelengths but this one is ideal for Urine at 365 NM wavelength.
Powerful enough to use in natural light, this light will highlight the issues left behind by a previous owner/tenant or any puppy or kitten training issues.
NOTE. A UV flashlight is NOT A TOY. Please ensure you also purchase UV eye protection and were them whenever using the light.