Theres blu tack stuck in my left airpod, can these be cleaned free of charge?

No.

Apple doesn’t clean or repair AirPods.

They replace them if there is a hardware defect.

User damage is not covered.

You can buy a single AirPod here:

https://support.apple.com/airpods/repair/service

The individual AirPods are not serviceable.

Hello Shad05,

Thanks for that info and for choosing the Apple Support Communities. If we understand correctly, you need to clean your AirPods. To do this, please follow the steps in this Apple resource:

How to clean your AirPods and EarPods

Cheers!