Tefilin: Checking: When

It is customary to check tefilin twice in each seven year period. Tefilin do not usually require checking, but you should periodically check:
  • Tefilin of the type that can become pasul (due to white-washed parchment).
  • Tefilin that are moved a lot, such as from place to place where there are large changes in temperature.
  • Tefilin in humid climates, such as Florida.
NOTE Ask a sofer for advice about any of these cases.
 
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