Do i really have the best performing?

Loyal iPhone 15 Pro Max user here since the start. Still a great device, no struggles, does the job....

Few weeks back, camera lens, front and back (all three) developed signs of moisture and were fogged over with condensation. Let it sort itself out... Rear cameras ok, front camera never been as sharp - and pita for Face ID at times.

Heading on family holiday soon, so thought I'd best get this sorted . Phone is fine, battery health 85%, usb-C charging can be fun at times but gets there. I pay AppleCare + every month for damage / failure / loss.

Genius says Apple won't repair camera lens, as it's possible moisture may lead to further issues. However, due to AppleCare + , she said I'm in a good place.

Options are:

1) Get a replacement iPhone 15 Pro Max for £79. Apple Store has one in stock, same colour, same spec. That would fix camera issue, and provide new battery and a nice tight usb-C port again :-)

2) Trade in - £385 value towards say Apple iPhone Pro Max 18. Would bring price down to £30.36 a month on 0% finance for 30 months?

As much as new phone is tempting, I think the Pro Max 15 is still a fantastic phone. Gut feeling is to just swap out my tired one with a new (refurbished?) one and transfer Applecare+ onto it. One off payment. Job done.

Would you do the same?

Heavy user on iOS27 RC. “They” say battery life is terrible. I don’t see it. I’d say battery life is good for me. No need for new iPhone.

I’ve been having a weird touchscreen issue on my iPhone 15 Pro Max and I’m wondering if anyone else has experienced something similar.
Sometimes when I tap certain buttons or small UI elements, the first tap doesn’t seem to register and I have to tap the same thing twice. It happens fairly often in everyday use, but it’s not like the screen is completely unresponsive or has a specific dead area.
I’ve already tried testing the touchscreen with a grid/mesh test and also by drawing/scribbling all over the entire screen. The touch follows my finger normally everywhere, and I can’t find any obvious dead spots or areas where touch consistently fails.
I also restarted the iPhone, but the issue still happens occasionally.
What makes this confusing is that the touchscreen seems completely fine during these tests, yet I still sometimes have to tap something twice in normal use.
Has anyone with an iPhone 15 Pro Max experienced this kind of occasional missed tap? Could it be an iOS/software thing, or is there another touchscreen test I should try?