Yep I think you might be costing yourself a lot of time and wd-40 there Dean!
To be honest, as long as you run your blower up open-flow for a few minutes at the end of the day you barely need any wd-40.
My end of day procedure: leave machine running on idle, open vac ports, remove waste tank lid & strainer, dump waste, attach pressure gun to solution lines and jet wash the tank & filter, put it all back together and then a little WD on max revs before shut-down. I've just about finished a large can of WD-40 that I bought about a year ago!
With the waste tank lid off, your blower is getting some nice fresh air to dry it out.
Over Xmas when I knew I wasn't going to be running the machine for a couple of weeks I removed the blower filter and gave it a good squirt of WD on max revs straight up the spout, just to make sure. Then I got a call out the next day :