Please help Photoshop cc 2018 Eraser tool very laggy

[LuluGypsy]

Its been this way for two months i've just gotten used to it now, but it takes 10 times longer to rub something out.

Any suggestions would be greatly appreciated. I have reset the tool but it makes no difference.

Thank you

[JJMack]

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[Omar.Fathy]

You are using a graphic tablet ?!