[Leica] Retouching enlargements experience?

[lluisripollphotography at gmail.com (Lluis Ripoll)]

I?ve encountered sometimes when I enlarge a small dust like small hairs that 
ruin the enlargement. I clean it, I look to the negative with a magnifier 8X 
but sometimes I?ve removed the dust from one point to another point.

To clean the nregative I?m using PEC PAD with the special tissues provided 
but sometimes a supplementary action on the enlargement would be necessary. 
I think it is very difficult do a good retouching and make a similar tone to 
the one of the print.

Some experiences about cleaning better the negatives or applying retouching?

Thank you!
Lluis