Manual removal is often the most effective method for deep clogs because it physically extracts the hair rather than trying to dissolve it.
Note: If you have PVC pipes, be careful with boiling water; let it cool for a few minutes before pouring so you don't melt the glue. how to unblock a bath full of hair
Here is your step-by-step guide to banishing the beast in your drain. Manual removal is often the most effective method