Take a look at the photo and note the position of the two plugs. The top one (which may be clear despite what it shows in the photo) must be removed before use. The one on the side above the label (which is always colored) is for refilling the cartridge. Do NOT remove the entire foil seal from the refill bottle. Puncture a small hole in it. This gives you greater control over the flow of ink. You should actually have to exert slight pressure to force the ink in.

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