LOL Same here Lefty.
Plus at times when I'd use the R-0870 DPD Powder there would be little crumbs of it higher up on the tube above swirl level, so I'd have to try to tip the tube to get the water to grab them. I didn't want to cap it, and start shaking it up like crazy trying to get the particles off the side because I was afraid I'd mess the test results up. The directions say, swirl, they don't say, shake. (LOL it's not a martini that's being mixed here, so we really don't have the options of whether or not it is shaken, or stirred).
So instead, I'd try to scape the powder off the tube sides with that little, short, plastic, not even close to being a spoon thingy that comes with the powder, yet is too short to reach the bottom of the tube, then I'd have swirl in those crumbs with the rest of the water, etc. A Royal Pain for sure.
LOL, and you ALL can feel free to laugh along with me on this, and get a free laugh at my expense. I'll admit that I did make the mistake, and used the wrong end of the plastic, not even close to being a spoon thingy for the above task.
Which for future reference, and as an FYI for Everyone reading this, DO NOT, I repeat, Do Not, get the scoopy end of that thing wet because 1)It turns it black, making it look really gross, and 2) All the drying, or the little spongy thing that it hangs over to drip on in the kit once it's turned black, doesn't seem to help it dry at all.
So, you end up with the powder for your next test getting stuck inside your now Black, plastic, scoop, and there you stand, looking really stupid and confused,

wondering how the heck to get it back out of the scoop without getting it wet again, or wasting the powder, and starting over. It's a vicious cycle, so learn from my mistake on this one.
I hope everyone has a wonderful day.