Firstly i will say that ink tank printers is for user that needs to print regularly. Even once a week. It is not for users that only uses it 4 times a year for kids quarterly school projects. Even though you only print 150 pages per session, you do not qualify to use such printer. Simply because the printer is not designed to stay idle at all. Already said this many years since the existence of the add on version. No one listens.

Also for TS, original bottled ink for tank printer is already cheap. In your case RM25 per color is very low with combined color printing that is good for more than 4000 pages. That is as cheap as it gets. For your problem of head blockages, refer above.

While the blocked print head is replaceable, it is not a tool less affair. Need more work than Canon G3xxx series. If you are not willing to cough up the RM3xx price for a original print head, and you are not confident about using a cheaper RM1xx print head, then junk the printer and save up for laser.

Bro... No one does this kind of service. Or such kind of service even exists at all! You think like flushing car fuel injector meh?

Only soak the ink spray nozzle section into warm water. But such technique is only valid for ink cartridges. Not ink tank print head because there are no ink pressure ready to purge out once the blockage is cleared.

You also do now know the print mileage of the separate pint head compared to cartridge one. Typical 150 pages vs 7000-15000. Unless you can prove that you can unclog the ink tank print head without using the clean/ flush feature, then I rest my case.

TS got show his printer model right? You can google how that model ink tank works right? Neither Canon nor Epson uses cartridge ink tanks. So that video not even valid for this case at all.