As long as you use the dishwasher safe variety, you can use them indefinitely.
Sorry - I have to add a bit of pedantry on this. Condoms can only withstand 40-45 washings before they begin to degrade to an extent that threatens the safety of the user's purpose. Nippled condoms have about 10% less washing lifetime due to the extra action on that portion.
Your mileage may vary.
You must be using pot scrubber and heat dry. Clothes line outside on a Spring day works best.
Golly,
I reach for the Unsubscribe button about 2 or 3 times a week... but inevitably the thread conversation shifts to the high-minded content observed above... 
Yes, I want a change
... TF seens to still be on extended leave in Bangcock, receiving weekly communications from saif Advisors... 
