Hi. I’m a complete beginner. I have a leaking bathroom tap. I’ve watched videos online about how to take it apart and replace the washer. The problem is I’m struggling to get the top off. I watched someone remove the bit at the top that says cold to expose a screw underneath. I can’t get that top bit off. It’s so tight and I can’t slip a Stanley blade round it. Am I right to be trying to take it off? And if so and advice as to how?
I have attached pictures. Thanks so much.