Q. Should one be makpid for the Chazon Ish's chumros (stringency) on Sh'mittah in Israel? if you buy Sh'metiah food from a store or anything from a store which sells Sh'mitah food and you get back change from the cashier do you need to assume the money may be d'mai shveeis (money that maintains the holiness of Shmitah)?
A. Horav Shlomo Miller's Shlit'a opinion is that it depends on each individual and his other common practices if he is to follow the opinion of the Chazon Ish on Shemitah or no.
Regarding the change given in a store it would depend on what the majority of the money available there is.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller and Horav Aharon Miller Shlit'a