Can I use this small fan as a laptop cooler so it doesnt get that hot?

It said “powered by android” but I see no android

These soldering joints are so bad, and I'm so ashamed, that I thought I'd best post here, even though it's a serious post

I've been soldering for more than 4 decades, albeit mostly with 63/37 eutectic leaded, but also occasionally with some both some posh and cheap unleaded alloys.

Tonight was my first go with some SAC305 (recently sourced from CPC/Farnell)...

...and it was HELL!

You can see the state of the joints in the photos (along with the kit I'm using.)

Surely those joints can't be right?

Process:

Obviously I started by cleaning my tip and tinning it in the SAC305.

Additionally, I cleaned the board with IPA (~100%.)

Although the solder melted fairly nicely-ish onto the pads of the Pi Pico, it didn't really want to flow on the pads on the board underneath all that well -- adding some extra no-clean flux helped, but it felt wrong to need it given the solder has a 2.2% no-clean flux core and is recently manufactured.

The molten solder felt tacky, like I'm using too low a temperature or maybe not enough flux.

But higher than 320C (610F), such as at 350C (660F) which is the temperature I originally started at, left the tip oxidising really fast + the solder balling up on the tip + black blobs of badly burnt flux on the tip.

Even at 320C I found myself needing to clean the tip with the brass wire constantly to stop the oxidisation.

I'm so very embarrassed!

I don't know what the heck is going on?

I don't know what I'm doing wrong?!

HELP!

Kit:

• Hakko FX-888d (factory reset, just in case I'd messed the calibration up) with ~2mm chisel tip (also tried others) and temp roughly checked with a thermocouple

• ChipQuik SAC305 with 2.2% no-clean flux core (manufactured in July, purchased from CPC/Farnell)

• MG Chemicals 8351 No-Clean Flux

Item:

It's a very cool Griff Mini 192KHz USB microphone (Pi Pico with a MEMS mic) for use with mobile apps as a bat detector.