Take care of and maintain your Airsoft gun. Clean the exterior surface after field or CQB activities. Spray (sparingly) silicone lubricant or other non-petroleum-based lubricants on surface areas and thoroughly wipe the surface with a cloth until the surface is clean and dry.
Lightly Lubricate moving parts, Hop-Up and the barrel bore (use cleaning rod and cleaning patch). The frequency of lubrication depends on the amount and type of Airsoft use. When lubricating your Airsoft only use silicone lubricants and avoid petroleum-based lubricants as it will destroy seals. Only lubricate the magazine feed nozzle and BB canal if you had to remove dust/debris that may have entered the magazine. If lubricant is required to restore proper magazine functioning, use silicone lubricant sparingly and remove any excess lubricant with a Q-tip until the lubricated surface is dry. Otherwise, lubricating the magazine is not recommended.
With some magazines and fixed loading ports, BBs are loaded by inserting them against the resistance of a spring until the magazine or loading port is full, which means that the spring is fully compressed. Do not store magazines loaded with BBs. Over time, a fatigued magazine spring may not have enough tension to properly feed the BBs.
Magazine does not feed consistently - ensure that the BB canal of the magazine is clean and free of debris (dust). Test that the magazine BB tension spring is functioning properly. Check your owner's manual for further instructions.
Velocity drop - If you're using a gas-powered Airsoft, you may be losing pressure and need to replace/recharge the power source. An AEG's battery may require recharging. A spring gun can develop spring fatigue (weakening) if the gun is left cocked for extended periods of time. If this happens the mainspring will require replacement in order to restore optimal performance. In Airsoft guns equipped with a Hop-Up System, increasing Hop-Up will decrease FPS (this is normal). If you are using paint filled marker BBs or powder coated marker BBs, check for possible build up in the Hop-Up System and/or the barrel. Clean these areas in accordance with the maintenance instructions that came with your Airsoft.
Battery no longer holds a charge/charge drains quickly - This is a clear sign of battery failure. Replace the battery. Remember, it is better for battery health that you deplete most of the charge prior to recharging, rather than subjecting the battery to unnecessarily frequent charge. Another tip is not to charge the battery beyond the duration specified in the charging instruction provided with your Airsoft/battery, doing so will reduce the life of your battery. Overcharging is the lead cause of short battery life.