my eraser tool erase take more then one click

[#1]

hey everyone

i am new to adobe photoshop 

and when i erase it takes more then one click

means when i click it erase but still it is visible but it is light and it take 1 to 10 or 5 clicks to erase it all 

can you help me with this

[#2]

hey everyone

i am new to adobe photoshop 

and when i erase it takes more then one click

means when i click it erase but still it is visible but it is light and it take 1 to 10 or 5 clicks to erase it all 

can you help me with this

[#3]

With the Eraser Tool selected, look at the options running along the top of Photoshop. If you don't see these, activate the Options entry within the Window menu. Make sure the values for Opacity and Flow are set to 100%.