Memory lapse?

I seem to have forgotten how to make a decent cup of tea. I know that, technically speaking, it's as simple as throwing hot water, milk and a teabag in a mug and just letting it fester for four minutes, but I've always prided myself on taking care over every brew I prepare, and I've always received positive comments for my efforts.
Now, though, I'm serving up either tasteless, bland, over-milked filth, or tea so strong you could stand up daffodils in it, and I'm not entirely sure what's gone wrong. Maybe it's one of those things that you lose the ability to do once you think about it. When you've been doing something on autopilot for decades and then you suddenly become aware of what you're doing, it can throw you completely and lead you to question your routines. Then you can't relax and rediscover your mojo because your own head is getting in the way of your skill set. So now my confidence is shot to bits and I'm starting to avoid the office kitchen for fear of being asked to make someone a cuppa. I know it's not a huge thing, but it's come on so suddenly and thrown me so far sideways that I'm wondering whether this will become a worrying trend in my life and start affecting other things. Am I suddenly going to approach a busy junction and forget how to apply the brakes? Am I going to pick up my phone to message my sister only to find that the knowledge of how to type numbers in has deserted me? Will I forget how to swallow, or walk, or breathe????

RC 2-6-26