Removing Spider Poo Stains from Upvc Window Frames

[utterlydiy]

Anyone know of ways of removing spider poo stains from upvc window frames.

Tried several methods like bleach and water, jiff and others from google not using any abrasive pad etc, but nothing seems to budge em

 

[Wayners]

uPVC solvent cleaner. Buy at most DIY stores

 

[lostinthelight]

uPVC solvent cleaner. Buy at most DIY stores

I found the one from SF to be very good