The magenta ink channel on my inkjet printer is blocked. I know about products on eBay, but I'm located in South Africa. I know that I shouldn't use methylated spirits (since they will leave a residue), pure 90% alcohol or water.
The solvent needs some type of surfactant cleaner that will bust the dry ink, but not damage the print head channels. I have not touched the print head yet, as I'm just printing e-books (i.e., using black ink channel/tank) at the moment.
Canon will tell you (every time) that it's best to buy (yet again) a new printer. I have never used refills on it, but have not printed anything for a month. Deep cleaning just wastes ink and then fills up the waste-ink reservoir. I had to clean the waste-ink reservoir as best I could and reset the waste ink reservoir counter—there is a secret way to do so.
I already have one (old) useless Canon printer in the cupboard, so there must be some household detergent that comes close to the real inkbuster product from the US on eBay.
However, before I try, I need to know as much as possible about the possible solutions for this. Also, I will store the ink tanks with their caps on whilst cleaning the printhead assembly.