Best way to cut silicone from back of cistern?

[Mr Sparkle]

As close couple toilet does not sit flush with the wall, the fitter placed some wood behind the cistern (maybe some plasterboard too) to pack it out

They siliconed the cistern to the wood/plasterboard

Now I would like to know, what tool would be best to cut this silicone?

I need to remove the cistern to replace the doughnut

 

[Madrab]

I use a thin serrated carving knife I found in my kitchen drawer, one of those really cheap crap bendy ones you can get out of the supermarkets.

 

[Elkato531]

Like Madrab, I've got an old kitchen knife I use. Have also used a hacksaw blade in the past as well.

 

[CBW]

Utility/Stanley knife usually to score it, and pull gently on cistern.

 

[freddiemercurystwin]

A wire saw?

 

[Mr Sparkle]

I use a thin serrated carving knife I found in my kitchen drawer, one of those really cheap crap bendy ones you can get out of the supermarkets.

Worked a treat

Thank you