In this day and age Im sure you can get hold of a digital camera. Use a phone or borrow one. The symptoms sound very much like spidermites but it is not certain that this is your problem.

Have you seen any evidence of the critters... webs or the critters themselves?

Im only saying incase you waste your time trying to solve a problem with the wrong solution and therefore letting the real problem get worse.

A small amount of searching the net by yourself will turn out a vast amount of info regarding spidermites. Ladybugs are great and have worked for me. There are other natural predators that you can introduce to your grow to take care of them.

Thrips are another critter that could be causing ur problem so I stress once again pics.. pics... PICS. Good luck :hippy: