While relighting my boiler's pilot I noticed the pilot gas valve is dripping some type of fluid onto the floor under the valve.
I upgraded my 1964 natural gas hot water boiler to a standing pilot gas valve last winter. Within the last couple of weeks I've had to relight the pilot light 3 times. This fluid is clear, has no odor, and does not seem to be oily.
Does a standing pilot gas valve contain fluid?
I first thought this to be condensation. I found nothing on any of the gas lines, to or from the pilot gas valve.
Turn off the gas (at the Meter) and remove the cap from your gas line's Sediment Trap, to drain and clean out the trap. The Sediment Trap is a short tail (up to 6-inches long) of pipe hanging down just before feeding the appliance. The Sediment Trap is meant to receive particulates, but minor amounts of water can and do accumulate over time.
Your Sediment Trap may actually be full of particles and a little water. Since you're dealing with a gas-line you'll need to pick up a small and cheap tube of Thread Sealant and apply that to the pipe threads that the Sediment Trap's cap screws onto.
Test the reinstallation of the Sediment Trap's cap with a little soapy water. Any expanding bubbles in the soapy water means you have a leak and need to re-apply the Thread Sealant and/or to tighten the cap more than you had. Temperature difference from the pipe's underground home and your home is where this water comes from. So, stop venting the clothes dryer into the utility room and leave the utility room's door cracked open.