Dilution: Highly concentrated cleaner, diluted by 1:5, can be adjusted according to the effect of the ratio. 
Cleaning: After wiping the chip, make sure there is no residue. 
Scope: For chip cleaning only, do not use on ink cartridge print head.

Dilute 1:5, then wipe the ink contacts, and the contacts on the printer pen holder, wipe the residual cleaning solution with pure water, wait for the chip to dry, and the pen holder to dry, then switch on the printer and install the cartridge.