Leaky Faucet

I have a vanity faucet that I bought in Sears about 10 years ago. It drips so I went and bought a repair kit for it. It is washerless, so I installed a new cartridge, on both hot and cold. I tried to replace plastic insert , ( the seat that the cartridge seats down on), but I couldn't get them out. I thought well , maybe the insert is ok, so I'll just keep the old ones in. Well it still drips...Is there any tool to pull them out, the inserts. They are just a plastic plug with 2 holes in them, with a O- ring to seal.
Thank you, Andy
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