I alway remove the battery,after I clean and dry the detector after any hunt, so that I am sure that there is no leakage which could damage the detector / discharge the battery.
After use, I charge the battery, and store it in a zip locked plastic bag, till I am ready to hunt.
I also put an open plastic bag, over the CTX 3030 open contol housing, leaving the plastic bag loose at the bottom so that moisture will not build up to protect the detector from dirt and debrie.
When I am ready to hunt I use a short blast of air on the seal as an extra precaution, if dust /a small grain of sand/dust got in. As this usually pops the seal out, it provides an opportuning to carefully inspect the seal before use and be sure it re seals properly.
I would not use silicon grease or anything which sand could stick to.
When, needed, simply will replace the seal when you need to.
Pressure should be taken off of the seal, when the detector is not being used to prevent the
seal from deforming or sticking after a long period of time..
Instead of using a wide rubber band to secure the clamps (so that they will not open accidently) I prefer to use blue masking tape used by paintes as it is less sticky, to wrap around the clamps securing it and from sand getting in at the beach. If I am detecting unprotected waters, I will use electrical tape for extra protection lwrapped over the blue tape. I avoid using electical tape directly over the clamps as it could leave a sticky residue if it gets warm during the heat of the day.
Even with all of the above precautions I restrict usage of the CTX 3030 to protected waters and avoid submerging the digital display and control housing. I use an Excalibur, which has been hardened for diving, for deeper waters.
How do store your CTX, especially during the winter when hunts are few and far between. Do you keep your battery on the detector or remove it? The reason I'm asking is because I want to keep as much dirt and debris from getting in there but I heard keeping the battery in is no good. Thanks Mike