How do I soften a rubber wiper blade?

[andrewward]

Hi All,

Can someone please tell me how to soften black rubber?

I have a window cleaning squeegee with a rubber blade. I didn't notice at the time of purchase that the rubber blade is really hard. It's not old, hardened rubber. But, just too hard to wipe across my car windows.

Thanks
Andrew

 

[GrahamBennett]

You can't permanently soften cured rubbers without damaging their properties.

 

[SiliconeAurora]

Pretty much true. Sounds like you got sold a poorly compounded, likely cheap rubber product.