Good to hear dip sticks are reasonably sensitive. I’ve used 4 of them and all negative.

Where are you supposed to insert the dipstick?

Hold on.  Are you using any sort of toilet cleaner, detergent block or bleach?  Any liquid hitting another with soapy stuff in it will cause bubbles.
try pissing in milk bottle of something like that.

try pissing in milk bottle of something like that.

Measuring jug. Might as well estimate flow rate and volume at the same time 😉

For my Chris Froome defence, I measured urine output for a week. You make about 0.5 to 1 mL/kg/hr if you are interested. Much less when exercising (down to zero in fact).

This came up at work a few years ago, someone saying it was a sign of something serious. Someone else that might have been me started putting a few drops of washing up liquid in the toilet.

I went to the doc for this exact thing and the first thing she did was put a dipstick in it. The sample, I mean.