Tire problem need solving

[joe.ds450]

hey whats up guys i need some help on my rear left tire. i must of hit it but im not sure when and how but it leaks and i can fill it up with air and it will stay inflated mostly throw out the day but when i put it the shed after a days riding i find the next mourning that the tire is flat again. I've had ideas of taking the tire off and taking it to a gas station or a mechanic to look at it and see if he can find the hole and patch it....or i having thoughts its the beed....can any one give me some feed back please?

-thanks
joe

[gregory]

Fill the tire to about 25-30psi take a spary bottle of dish soap and water.
Spary every inch of the tire and wait for soapy bubbles to form, also spary the valve stem inside and out.

[stb103]

And if no luck take rim off and fill something...tub, garbage can etc with water, fill tire up and force it under, follow the bubble trail. Check valve stem that the pin is releasing in the center, I've had them jam up... Take a small punch or flathead and tap it see if it pops back up.