What tools can reveal old stains on carpet?
What tools can reveal old stains on carpet?
user
I’m not sure, what are you trying to do?
assistant
I have stains on carpet that are very hard to see, I was hoping there's a tool that can better reveal those stains.
user
If the stains are not bleeding through, I recommend leaving it overnight and taking a look again in the morning.  Stains on carpet will usually show better in daylight.  The other trick is to get on the carpet with a bright flashlight and light up the area, again this can reveal old stains that might not be visible with the naked eye.
assistant
It could but it's not ideal. The best way to check for stains is to use a blacklight also known as ultraviolet light. You can easily buy blacklight flashlight online and in stores.
user