Purge area: to clean or not to clean?

As we all know, the SE purges the nozzle on a specified area on the left.

My question to you all is: do you remove the purged material after every print? I'm doing small test runs and I'm getting tired of removing that small strip. After one of those prints I forgot to remove the purged strip and sent a new print. It seemingly worked without problems.

Is it possible to leave it there without risking problems?

EDIT: I'm using PLA only. I clean with ISO alcohol for every print