You don't need to buy a new grip tape for your skateboard 'cause most of the time it just needs a proper cleaning!
Did you know that you can clean it with a inexpensive Sand Belt Cleaner?
Just 1 block will last for many years, and will save you a ton of money in the long run ;)
You can one at your local hardware store, or look it up online
They can come in different shapes and sizes.
Step 1: Disassemble the Skateboard
For best results you need to disassemble your skateboard first.
Unscrew the 8 bolts to release the trucks, and notice all that dirt...
Step 2: Cut a Pice From the Sand Belt Cleaner
Cut a piece from the Sand Belt Cleaner (I used a hand saw), about a size that you feel comfortable grabbing.
Give it a few circular scrubbing for testing and you'll immediately notice the difference!
Step 3: Finished! (Good As New)
Keep scrubbing until you covered all surface, and then... enjoy your "old new" skate grip tape!