Lick the frosting off…

Think up every swear word you know, because you’re gonna need them all.

Use a knife and carefully scrape off what you can while cold. Heat to printing temp and wipe off what you can. Cool down and clean with acetone if need be. Edit: do this only with metal pieces. Disassemble head if need be.

Blow on it really hard.

If the head is all metal, soak it in acetone

Nuke it from orbit.

It’s the only way to be sure.

What type of filament is that?

Maybe try a heatgun to soften it. I’m not sure, might damage the plastic casing.

I have heated it up just until plastic becomes malleable and used a damp cloth. I have also used a soft wire tooth brush to remove

I just bought a new heating element when that happened to me.

I might go back with some acetone now after reading others’ comments.

Hrrmm. Does it still print? Personally I’d go with hope it kind of burns off over time with normal use. Others may disagree…

Microwave