I stumbled across an Instagram post from Tobias Freidreich talking about housing maintenance and he mentioned using a Wolfbox mini blower, which is usually used to clean out PCs, keyboards etc. This is the blower:

Wolfbox AU

Electric Air Duster –110000RPM Super Power | WOLFBOX MF50

WOLFBOX MF50 Electric Air Duster with 110000RPM super power. Perfect for electronics, keyboards, cars, and outdoor cleaning. Order now and make cleaning simple!

It is a Li ion rechargeable model and does put out a lot of air. I tried it out for the first time today blowing my Nauticam housing dry after a long soak. It develops good velocity using the smallest nozzle and really moves the water droplets quite quickly. In a couple of minutes I had blown the housing completely dry, I hovered it vertically over each button and along each seam and used it to clear out water from behind the latch and all the crevices and around the vacuum valve cover. I also tried it out blowing out the 0-ring grooves.

I found it performed pretty well , you need to go over the housing a few times as each new bit of water you blow out of crevices needs to be blown off the housing surface. All in all it is a big improvement of the rocket hand bulb I've been using and it's nice and portable for travel. A full blow down uses a good percentage of the available charge though. It actually seems more efficient than using a scuba tank with a duster attachment to blow off water.

I think it's a worthwhile addition and would recommend it.

This process of blowing off all the water droplets is important to help prevent the white coating that tends to appear on anodized housings over time. If water droplets are allowed to dry the salts in the water concentrate and start to etch the coating. It also seems efficient in blowing out residual water behind buttons and various controls. Here's a pic of it with my housing:

Uploading Attachment...

It should help keep you housing looking good and have a longer life. Usual disclaimer, no relationship to vendor, just happy customer. Searching for Wolfbox air duster will bring up lots of vendors. They do have a bigger more expensive model, but this one seems quite adequate for the job.

Uploading Attachment...

I'm not familiar with the Wolfbox blower, but I've been using the Nitecore BB21 for several years now and I'm very happy with it:

https://www.nitecore.com/product/bb21

It's definitely a good gadget for removing water and dust, and certainly much more powerful than a manual blower.