What you did was a great improvement no doubt. I've found that an easy way to clean the reservior is to remove it & fill it with alcohol, then thoroughly dry it. Unfortunately, that takes more fluid & should be done first.
My 2 cents, Paul.

__________________
1984 300CD red/blk 290,000 partial resto
1980 240D 4 sp Brn/palomino gone
1997 Mazda Miata STO edition wife's baby
1988 Lincoln Mark VII LSC next resto
1986 Subaru GL wagon daily
1993 Isuzu pickup field beater
2008 Honda Civic EX-L 5sp wife's new car
1978 Honda XL350
1974 Honda XL70 my Calif. ride in HS