Looking for suggestions: I have a Elektra Nivola and have the parts to service the machine but I can not unscrew the screw that holds the shower filter.
I assume it's in too tight but the bolt head part is very flat and nothing for a spanner or clamps to hold onto.
https://ibb.co/cT7vqvT

I assume it's in too tight but the bolt head part is very flat and nothing for a spanner or clamps to hold onto.
https://ibb.co/cT7vqvT

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