Rachsa

From Halachipedia
  1. One should wash with a Bracha before eating the Matzah. [1]
  2. If one know that one watched one's hands and one didn't touch an area that requires Netilat Yadayim one should wash without a bracha. [2]
  3. If one is sure that one watched one’s hands from touching something that requires Netilat Yadayim then one should rewash before eating Matzah without a Bracha. According to Ashkenazim preferably one should cause oneself to need to wash one’s hands with a Bracha. [3]

Sources

  1. S”A 475:1
  2. Chazon Ovadyah (pg 62)
  3. Beiur Halacha 475 s.v. Yitol. Halichot Shlomo 9:38 adds that Rav Shlomo Zalman would cause himself to require Netilat Yadayim with a Bracha.