How do i replace bulb in juno air-loc recessed shower light?

Step 1 Turn off the shower light at the light switch.
Step 2 Place a rug with a rubber backing in the shower stall for secure footing. Place the step stool on top of the rug.
Step 3 Insert a plastic putty knife between the outside rim of the light fixture and the ceiling. Be careful not to scrape the finish off the ceiling when inserting the blade.
Step 4 Pry the fixture cover away from the ceiling with the putty knife. The fixture cover includes a translucent plastic lens within a metal rim. The cover is held in place by torsion springs, so it will be resistant to release. Apply careful pressure until the cover pops off.
Step 5 Remove the old light bulb, and replace it with a similar bulb.
Step 6 Press the cover back in place. The torsion springs will click into place when you press the cover into the ceiling.

Is this information not contained in the manual ?

If I need to replace a broken recessed soap dish in the shower then I would definitely contact with a professional as they can fix this problem very easily.

Recessed lights have heat sensor to prevent fire. The sensor will turn off light until the sensor cools, then light comes on again.
The overload heat sensor has gone bad, or the heat from light bulb is tripping sensor.
Reduce wattage of bulb, or replace light

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Look for a small-cut like recess on the sides of the bulb-housing.
Put a flat-end screw-driver to that recess and twist off.
If that don't seem to work, insert the screw-driver to the base of he bulb-housing and pry it off with a gentle but firm twist.

552.54 Luminaires.
((B) Shower Luminaires. If a luminaire is provided over a bathtub or in a shower stall, it shall be of the enclosed and gasketed type and listed for the type of installation, and it shall be ground-fault circuit-interrupter protected.
The switch for shower luminaires and exhaust fans, located over a tub or in a shower stall, shall be located outside the tub or shower space.

Essentially there is no distance specified BUT the fixture must be sealed AND protected with a GFCI

It sounds as if you may have higher wattage bulbs and/or the wrong type of bulb installed in the can fixtures than the recessed cans are rated for.

When the wattage of the bulbs is higher than the rating of the fixture, and/or the wrong bulbs are being used, the recessed can's thermal overload device will shut off the light, to prevent damage and a possible fire situation.

It is unlikely that you've got a faulty dimmer, since you state that not all of the lights go off at once, thus it can be narrowed down to each can and thus the thermal overload being the culprit.

I would suggest you look inside the recessed can light fixture and determine what the maximum wattage bulb you can use, (60, 75, 90 watts, etc.) and use the next lower wattage bulb instead. I also install only Halogen bulbs in recessed cans, (they have a flat lens vs. a rounded bulb lens area like PAR type bulbs). Halogen bulbs are also the most efficient incandesent bulb that provides the whitest light possible and directs more light (and thus heat) downward away from the recessed can.

I avoid using a standard light bulb or PAR type bulbs in any recessed can fixtures as they tend to heat up quite a bit and cause the thermal protection to trip frequently.

As a Master Electrician that has installed literally thousands of recessed fixtures and dimmers, I can say that my customers prefer the Halogen light over standard bulbs and they last longer too.

I hope you find this Very Helpful and best regards!

Most "can lights" have a spring clip on either side of the cover and you simply pull down on it. To completely remove it you push together the clips, and pull them through the slots.

This may not apply. There could be an electrical problem. But if you installed the bulb with your hand, the oil on your skin can cause the buld to heat excessively and fail. I suggest you use the packaging or part of it when installing it, taking great care not to touch it.