“Straightforward measurement system (protip, remove the foil from under the cap first...), followed instructions and left feeders to soak for approx. 5mins before cleaning with the feeder brush (long bottle brush) also bought from this site. Left to dry fully in the sun before reassembly.
Removed lots of gunk and hopefully safer for the birds now. Intend to repeat regularly.
I was unsure about direct contact with skin, but found videos on YouTube where the demonstrators used bare hands. I have fairly sensitive skin but this product did not bring me out in a rash.”