Sometimes I forget that bag of salsa chips open and with the summer weather they go soggy.  How do I get them crunchy again before the guacamole is all gone? 
A quick and dirty way of achieving this is to microwave them for a bit. Microwave oven powers vary, so try 10 seconds first and add time as necessary. You'll find the right time for the right amount to bring your chips to nearly what they were prior to sitting out. 