Originally Posted by
jowilson
I don't know if this would be safe but I'd suggest taking the valve core out, filling the tube with water, and seeing if water is leaking out. You could also take out the tube, inflate it to around 10 psi or until it get somewhat fat( just don't explode it) and pouring water around the tube. Any leaks will appear instantly. If you don't find any holes, replace the tubes and get some with the green slime.
Gee, why do things the hard way. You can put 6" of water in the bathtub, stand the wheel in it, and look for bubbles. Or remove the tube, inflate it to 1-1/2 normal width and submerging it.
Unfortunately, a 10psi / 24hours leak will produce bubbles slowly, you you'll have to be patient.