Hello all.
I am new in here and I am sure that this has been mentioned many times.
I am in training for a London to Paris cycled ride and have suffered under-carriage wise as I have increased the miles, especially when I changed to a road bike.
My situation has improved a great deal since i lowered my saddle (only about 1/2 an inch) and apply udderly smooth to the inside of my shorts before setting off.
Hope this is of some use.