How does Baron Zemo eat with that towel permanently glued to his face?

Does he keep himself nourished by other means? Injections?

You answered your own question most likely.

That towel is stuck to him?

Helmut? He can simply remove the mask.

Gallery

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@supermanthor: I read Avengers issue 6 and it was revealed that the towel or cloth has been stuck onto him with Adhesive X for as long as Cap has been frozen, now I want to know how he's been alive for that long without eating.

@morpheus_: He can now but in Avengers issue 6 it was revealed that he's had that cloth glued to his face for as long as Cap has been frozen, he was very desperate to find a way to remove it in that issue.

Well that was Heinreich Zemo and hes been dead for a while.

Nutrient enemas?

Yeah the Original Zemo (Heinrich) had his reddish-pink hood permanently attached to his face after Captain America threw his shield at a chemical Vat which contained adhesive. Zemo was standing right next to the Vat, which poured over his hooded face and quickly seeped inside his mask and permanently attached the hood to his face, preventing him from ever removing his hood

"Intero-Rectogestion"