Lucknow - Opening batsman Shai Hope struck an unbeaten century as West Indies outplayed Afghanistan by five wickets in the third one-day international on Monday to complete a 3-0 series rout.
"Winning is a habit, and anything that we want to do as a team is a process, and it's something we had to improve in a period of time.
Afghanistan's teenage spinner Mujeeb Ur Rahman took two wickets to reduce West Indies to four for two but Hope stood firm to keep the chase on track.
Chase was named man of the series for his 145 runs including a highest of 94 in the three matches and six wickets with his off-spin.
Opener Hazratullah Zazai hit an attacking 50 but the rest of the top-order fell flat.
"We were just trying to be better in each and every game. There were more positives from us in today's game," said Rashid.
The two teams will now play three Twenty20 internationals om Lucknow starting November 14.