If a simple plunger doesn't do the trick, hiring a plumber is the most reliable (though most expensive) route.
The "standard" price can jump quickly depending on the severity and location of the blockage:
You can use specialized drain cleaners or even a simple mix of dish soap and hot water (let it sit for 15 minutes) to break down grease-based or organic clogs.
If a simple plunger doesn't do the trick, hiring a plumber is the most reliable (though most expensive) route.
The "standard" price can jump quickly depending on the severity and location of the blockage:
You can use specialized drain cleaners or even a simple mix of dish soap and hot water (let it sit for 15 minutes) to break down grease-based or organic clogs.