Cockroach chase leads to factory fire - how to eliminate cockroaches in your place?

Today, I read in a forum, i.e indiansafetyprofessionals@yahoogroups.com, that a house wife died of burns when she sprayed a cockroach killer in the kitchen near the gas stove which was ON. The spray, being flammable caused explosion.
Husband of the lady who tried to extinguish flames is still in the hospital due to burns.

I too had similar experience, though without injury, which I posted earlier. http://safetychat.blogspot.in/2010/09/safety-of-cockroach-killing-sprays.html

Then, when I searched internet for similar incidents, following links were found.

1. Man sets his factory on fire to kill cockroaches.
http://blogs.wsj.com/japanrealtime/2010/11/15/no-factory-smoke-without-roach-fire/

2. http://www.abc.net.au/news/2011-06-27/cockroach-spray-sparks-house-fire/2772730
http://www.mfb.vic.gov.au/News/Killing-cockroaches-with-aerosol-spray-starts-house-fire-.html


Best solution I found to get rid off the cockroaches is to use the latest HIT GEL and I am not finding any cockroach in my flat for the last few months (more than three months). Occasionally, when I find something, I use it and my house is free. Otherwise, there were hundreds of cockroaches, hidden behind tiles / corners / books / papers, etc and being in apartment complex, I thought no amount of treatment will solve my problem as they can come from other flats, even if I eliminate in my house.

The youtube video of the company can be seen in the following link:
http://www.youtube.com/watch?v=8Z9kv40SNpk

Some solutions given below:
1. http://housewifehowtos.com/clean/how-to-get-rid-of-cockroaches/
2. http://www.unce.unr.edu/publications/files/nr/2000/sp0007.pdf

Safety of cockroach killing sprays

Last week, my wife was in the kitchen and suddenly she shouted for help. I ran to her only to see that she is in a state of shock. Later, I was told that the gas burner was lit for cooking. After seeing few cockroaches nearby, she sprayed the killing chemical from the container around the cockroaches. Immediately, the spray caught fire from the gas burner and the flame came towards her. She turned off the burner knob and went into shock. I never thought that spray will be within flammable limits and this taught me a lesson.

Earlier, few years ago, when I sprayed the same chemical for killing cockroaches, over the electrical switch board and also inside the electrical winding section of kitchen mixie and then switched ON the electrical point, the MCB tripped in the house. Without understanding the reason, I set it ON and again switched ON in the kitchen. This time MCBs tripped at home as well as at the LDB in the ground floor of our apartment complex, from where power cables are drawn to my residence. Then, I set it ON. Next, when I switched ON the mixie, there was burning smell from it. Then only it occurred to me that the spray caushed short circuit and lead to tripping of MCBs and coil burning.