Ridges In Audio Jack
The audio jack stays in the port due to the ridges in the jack. The ridges also protect the wires so that music does not break while you are listening. There are bands in the ridges which dictate where the sound goes to – both headphones, the right only, or the left only.
Silica Gel Packets
We see these packets in shoeboxes or a new purse. The packets helps shoes and bags stay fresh and clean. Inside the packets is “desiccant”, which keeps moisture out. The small packets can absorb up to 50 percent of their environment’s humidity! You can use these silica gel packets if your phone gets wet. No need for rice buckets.